How Long Does a Windows 11 Upgrade Take? Honest Times for Every Update (and When It Is Stuck)

A Windows 10 to Windows 11 upgrade usually takes about one to two hours in total on a PC with an SSD and a good internet connection: roughly 20 to 60 minutes to download and prepare while you keep working, then 30 to 60 minutes of restarts with the "Working on updates" screen. On a PC with a hard drive, slow internet or lots of files and apps, two to four hours is normal. Smaller jobs are much quicker: a monthly Windows 11 update typically takes 10 to 30 minutes including one restart, and moving between closely related versions, such as 24H2 to 25H2, is a small update that installs in minutes. A clean installation from USB takes about 20 to 45 minutes on an SSD, and Reset this PC about one to two hours. If progress has not moved at all for several hours and the drive light is not flickering, it may be stuck; until then, patience is the safest fix.

Ethan planned to upgrade his family PC to Windows 11 on a Saturday afternoon, and his question to Jake was simple: how long will it be out of action? Jake checked two things first: the PC had an SSD, and the internet was fast. He told Ethan to start the download in the morning while the family used the PC normally, and to install it after lunch. The download and preparation took about 40 minutes in the background; the install, with three restarts, took 50 minutes more; and Windows spent another half hour quietly finishing up afterward, which made the first evening slightly sluggish. The old laptop in the spare room, with a hard drive, took nearly three and a half hours for the same upgrade. This page gives honest time ranges for every kind of Windows upgrade and update, explains what makes them slower, and shows how to tell a slow upgrade from a stuck one.

How long each kind of Windows upgrade takes

"How long does the upgrade take" depends heavily on which upgrade you mean. Windows has several kinds of update, and they range from a few minutes to a few hours. The table gives typical ranges for a reasonably modern PC; the sections below explain each and what moves them.

These are ranges, not promises. The same upgrade can take 50 minutes on one PC and three hours on another, and both are normal. The biggest single factor is the kind of drive, which is why the table separates SSDs from hard drives. Download time is on top of these figures for slow connections, though Windows usually downloads in the background while you keep using the PC.

Windows 10 to Windows 11: the stages and how long each takes

An upgrade from Windows 10 to Windows 11 happens in stages, and knowing them helps you plan and keeps you from worrying when the screen sits on one number for a while.

1. Download: Windows downloads the new version, several gigabytes, in the background. On a fast connection this takes 10 to 30 minutes; on a slow one it can take hours, but you can keep working.
2. Preparation: still in the background, Windows unpacks the files, checks compatibility and prepares the installation. This takes 10 to 30 minutes on an SSD, longer on a hard drive, and the PC may feel slower.
3. Restart and install: when you choose Restart now, Windows shows a "Working on updates" screen with a percentage, restarting several times. This is the part where the PC cannot be used, typically 30 to 60 minutes on an SSD and longer on a hard drive.
4. First sign-in: Windows shows a few setup screens, then the desktop. Expect a minute or two of "Hi" and "Getting things ready" messages.
5. Finishing in the background: for the first hour or two after the upgrade, Windows indexes files, updates apps and optimizes, so the PC may feel slower and the fan may run. This is normal and settles by itself.

The time you lose is mostly stage 3, plus a sluggish hour afterward. Everything else happens while you work. That is why Jake's plan for Ethan, download in the morning and install after lunch, cost the family less than an hour of PC time. Our guide to upgrading Windows 10 to Windows 11 covers the upgrade itself step by step.

Windows Update, Installation Assistant or USB: which route is fastest?

There are four common ways to upgrade a Windows 10 PC to Windows 11, and they take different amounts of time, mainly because they handle the download differently. The install stage itself, the part with the percentage on screen, is much the same in all of them, since every route runs the same Windows setup underneath.

Windows Update is the simplest route. When your PC is offered the upgrade, it appears in Settings, Update and Security, Windows Update, with a Download and install button. Windows downloads only what your PC needs, works in the background at a low priority so it does not get in your way, and asks you to restart when it is ready. Because it runs at low priority, the download and preparation can take longer than with other routes, but you barely notice it, which is the point. For most people, this is the best route.

The Windows 11 Installation Assistant is a small app from Microsoft's Windows 11 download page. It checks your PC, downloads Windows 11, and runs the upgrade, with a progress bar of its own. It works at a higher priority than Windows Update, so the download and preparation usually finish sooner, though the PC is busier while it runs. It restarts the PC by itself after a countdown when it finishes preparing, so start it when you can spare the PC within the next hour or so, or keep an eye on it to restart at a time that suits you.

Mounting the ISO file means downloading the Windows 11 disc image from the same page, double-clicking it in File Explorer to open it like a disc, and running setup.exe. The download is a single large file of several gigabytes, which takes as long as your connection needs, but once it is on the PC, setup starts immediately and works quickly. This route is handy when you want to upgrade several PCs, since one download serves all of them, or when Windows Update keeps failing.

A USB drive made with the Media Creation Tool can upgrade a PC too: plug it in, open it in File Explorer and run setup.exe, choosing to keep your files and apps. Making the USB drive takes 20 to 40 minutes, depending on the drive and connection, so this is slower for one PC but useful for several, and it doubles as a recovery and clean installation drive. Booting from the USB drive instead of running setup from Windows performs a clean installation, which removes everything and is covered further down.

In practice, Ethan used Windows Update for the family PC because nothing about it needed his attention. Jake, who upgrades friends' PCs, keeps a USB drive in his bag, because one drive saves several downloads and works even on PCs whose Windows Update is broken.

What happens at each stage of the restart

The restart stage itself has phases, and the screen shows them in different ways. First, still in your current Windows, the screen says Working on updates with a percentage; Windows is applying changes that need the current system to be shut down. Then the PC restarts, sometimes more than once, and the screen shows progress again while Windows installs the new version, sets up drivers and features, and moves your apps and settings across. Finally, it configures settings and prepares the first sign-in.

Progress through these phases is uneven. Copying and preparing files can move quickly, then installing drivers and migrating apps can sit at one percentage for a long time, then the last stretch can jump ahead. Many people see a long pause at around 30 percent, another in the 70s or 80s, and a final wait at or near 100 percent while Windows tidies up before restarting. None of these pauses means a problem by itself. The screen also says not to turn off the PC; take that seriously during the whole restart stage.

What makes an upgrade slow

Several things decide whether an upgrade takes one hour or four, and most of them can be checked in advance. The storage drive matters most: an SSD reads and writes many times faster than a hard drive, and an upgrade is mostly reading and writing thousands of files. If you are not sure which you have, open Task Manager, Performance, and look at the disk: it says SSD or HDD.

Internet speed decides the download stage. A slow or unstable connection stretches it out, though it does not affect the restart stage. The amount of data on the PC matters too: Windows migrates your apps, settings and files during the upgrade, and a PC with hundreds of apps and a full drive takes longer than a fresh one. Free space matters, since Windows needs room to unpack the new version; when space is tight, it works more slowly and may fail. Our guide to how much free space Windows 11 needs gives the numbers.

The processor and memory play a smaller role on most PCs, but very old or low-memory PCs are slower throughout. Security software can slow the upgrade by scanning every file Windows writes; some third-party suites are known to make upgrades much longer. And external devices, such as USB drives and docks, occasionally slow or interrupt the install while Windows checks them; unplugging them before the restart stage avoids that.

This table sums up the factors and what you can do about each before you start.

Monthly updates and smaller version updates

Most Windows updates are much smaller than a full upgrade. The monthly security update, released on the second Tuesday of each month, usually downloads in a few minutes, installs in the background, and needs one restart that takes a few minutes on an SSD. Total disruption: often under 10 minutes of waiting, if you restart when convenient. On hard drives and older PCs, the restart can take 20 minutes or more.

Windows 11 also delivers yearly feature updates. When the new version shares its core with the current one, as 25H2 does with 24H2, the update is small, an enablement package that switches on features already present, and installs with a single quick restart. When the core changes, the feature update is larger and behaves more like a smaller version of the Windows 10 to 11 upgrade, taking up to an hour or so. Windows Update shows which you are getting by its size and description.

Microsoft has also been reducing restart times for monthly updates with features such as hotpatching on some editions and devices, which applies certain security updates without a restart at all. On home PCs, you can set active hours in Settings, Windows Update, Advanced options, so restarts happen when you are not using the PC, which makes the time an update takes almost irrelevant.

Download stuck at 0% or very slow

Sometimes the problem is not the install but the download: Windows Update sits at 0 percent, or creeps along. The download depends on your connection and on Microsoft's servers, and at the start of a big release, demand can slow it for a while. Leave it for an hour before worrying, and check that the PC is not set to a metered connection, which makes Windows hold back large downloads; turn metered off for that network if it is your home connection.

If the download is truly stuck, restart the PC and check again, run the Windows Update troubleshooter from Settings, System, Troubleshoot, Other troubleshooters, and make sure there is enough free space. For a Windows 10 to 11 upgrade, the Windows 11 Installation Assistant or the Media Creation Tool downloads the upgrade through a separate route and often succeeds when Windows Update struggles. Our guide to Windows 11 updates stuck at 100 percent or in a restart loop covers deeper fixes.

Laptops: power, heat and lids

Laptops add a few practical points. Keep the laptop plugged in for the whole upgrade; Windows may refuse to start an upgrade on low battery, and a laptop that dies mid-install risks a failed upgrade. Keep it open or set the lid action to do nothing while plugged in, since closing the lid may put it to sleep during the background stages. And keep it on a hard surface; an upgrade works the processor and drive hard, and a laptop on a soft surface can overheat and slow down.

Laptops with very small, slow storage, such as some budget models with eMMC storage, are the slowest of all, sometimes slower than hard drives for upgrades. They are also the most likely to run out of space; a USB drive can sometimes be used for temporary files during the upgrade when Windows asks for extra space, which it does on such devices.

Slow or stuck? How to tell the difference

The hardest moment in any upgrade is the screen that says "Working on updates" with a percentage that has not moved for a long time. Most of the time, the upgrade is still working; percentages are not linear, and certain stages, often around 30, 75 or 100 percent, take much longer than others. Interrupting a working upgrade is the most common way to turn a slow upgrade into a broken one.

Signs that it is still working: the drive activity light on the PC flickers, the spinning dots keep moving, the fan changes speed now and then, and the percentage eventually moves, even if slowly. Signs that it may be stuck: the drive light has been completely off and nothing has changed for several hours, on a PC with an SSD. On a hard drive, give it longer; three or four hours at one number is not unusual for a large upgrade.

If you believe it is truly stuck after a long wait, hold the power button to turn the PC off, then turn it on. Windows usually either continues the upgrade or rolls back to the previous version automatically, which can take a while too. Our guides to updates hanging for hours and to an update stuck at 100 percent or in a restart loop go through what to do next, step by step.

After the upgrade: what to check

Once you see the desktop, a few quick checks confirm that everything came across properly and help Windows settle faster. First, open Windows Update and select Check for updates. There are almost always a few updates for the new version, including drivers and security fixes, and installing them early fixes many small problems. Then open the Microsoft Store, go to the Library, and select Get updates so your apps update in one go rather than slowly over the next days.

Next, check the things you use daily: printer, webcam, microphone, sound, Wi-Fi and any special devices. If something does not work, the device maker's website usually has a Windows 11 driver, and Windows Update's Optional updates page often offers one too. Open your main apps and sign in where needed. Check that your files are in Documents, Pictures and the desktop as before; they almost always are.

Then look at the settings that the upgrade may have changed or introduced. Windows 11 centers the taskbar icons by default; if you prefer the left, change it in Settings, Personalization, Taskbar, Taskbar behaviors. Review privacy settings, default apps and startup apps, which Task Manager shows on its Startup apps page. Finally, give it a day. Windows indexes files and optimizes in the background after an upgrade, and a PC that feels slow on the first evening usually feels normal the next morning.

If, after a day or two, the PC is still slower than before, check Task Manager for apps using a lot of the processor or disk, look for outdated drivers, and make sure there is enough free space. If nothing helps and you are within ten days, the rollback described above takes you back to Windows 10 while you investigate.

How to plan an upgrade so it costs you the least time

With a little planning, a Windows 11 upgrade takes almost none of your working time. The trick is to separate the background stages, download and preparation, from the restart stage, and to schedule the restart for a time you do not need the PC.

1. A day or two before, check that the PC meets the requirements and has enough free space, and back up important files.
2. Start the download in the morning, from Windows Update or the Installation Assistant, and keep working while it downloads and prepares.
3. When Windows says it is ready to restart, choose a time: lunch, the end of the day, or overnight.
4. Before the restart, save your work, close apps and unplug USB drives and other devices you do not need.
5. Keep laptops plugged in during the whole restart stage.
6. After the upgrade, leave the PC on and connected for an hour so background work can finish, ideally while you do something else.

Overnight is often ideal: start the restart before bed, and the PC is ready in the morning, with the background work finished too. Windows Update lets you schedule the restart for a specific time when an upgrade is ready, which makes this easy.

Before you start: a 15-minute checklist that saves hours

Most long or failed upgrades come from a handful of problems that are easy to spot in advance. Spending 15 minutes on these checks the day before makes the upgrade itself far more predictable.

Check that the PC is supported. Open the PC Health Check app and select Check now. If it says the PC meets the Windows 11 requirements, you are good. If it does not, it tells you why, most often the processor, TPM 2.0 or Secure Boot, and some of these, such as TPM and Secure Boot, can be turned on in the firmware settings.

Free up space. Windows needs room for the download, the new installation and a copy of the old one for rollback. Run Disk Cleanup or Settings, System, Storage, Cleanup recommendations, empty the Recycle Bin, and move large videos to an external drive if space is tight. A drive with plenty of free space also upgrades faster than one that is nearly full.

Install pending updates. Check Windows Update and install everything waiting, then restart. The upgrade goes more smoothly from a fully updated Windows 10, and pending updates sometimes block it or make it longer.

Back up what matters. The upgrade keeps your files, and it almost always succeeds, but a backup turns any rare failure into an inconvenience instead of a disaster. Copy your documents and photos to an external drive or confirm that OneDrive or your cloud service has finished syncing.

Update or check your security software and key apps. Make sure third-party antivirus is up to date, and check that the apps you depend on, such as accounting software, games or specialist tools, support Windows 11. Most do, but older drivers for printers, scanners and audio interfaces are the usual surprises.

Note your passwords and keys. Make sure you know your Microsoft account password, the PIN or password you sign in with, and, if the drive is encrypted with BitLocker or device encryption, where your recovery key is saved, usually in your Microsoft account. You are unlikely to need any of them, but if you do, it will be in the middle of the upgrade.

Unplug extras and plug in power. Disconnect USB drives, memory cards and docking stations that are not needed, and keep a laptop on its charger. That is the whole list. Ethan did it on Friday evening, which is part of why Saturday went so smoothly.

Can you leave the upgrade running overnight?

Yes, and it is often the best way to lose no PC time at all. Start the restart stage in the evening, or schedule it, and the upgrade runs while you sleep. The catch is that Windows sometimes stops to ask a question on the first sign-in screens after the install, such as privacy choices or signing in with your Microsoft account, so you may find the PC waiting at a setup screen in the morning rather than at the desktop. That is fine; it simply waits for you.

For an overnight upgrade, keep a laptop plugged in and open, make sure the PC is not set to sleep in the middle of the background stages, and check that nobody will switch it off by accident, a real risk in a family home. You can schedule the restart from Windows Update when the upgrade is ready: choose Schedule the restart and pick a time. In the morning, sign in and give Windows its usual hour of background tidying before judging how the new version performs.

Changed your mind? Rolling back and how long it takes

For ten days after upgrading from Windows 10 to Windows 11, you can go back. Open Settings, System, Recovery, and select Go back. Windows asks why, offers to check for updates first, and then restores your previous Windows, keeping your files. Rolling back usually takes 30 minutes to an hour on an SSD and longer on a hard drive, with restarts, much like the upgrade itself.

After ten days, Windows removes the old installation files to free space, and going back requires a clean installation of Windows 10. If you are unsure whether you will keep Windows 11, try it properly in those ten days: check your important apps, printers and devices. Apps or settings you add after upgrading may need setting up again after a rollback. Ethan's family decided to keep Windows 11 after three days, and Windows removed the old files by itself at the end of the window.

Upgrade now or later?

Windows 10 reached end of support in October 2025. Home PCs enrolled in Extended Security Updates keep receiving security updates until October 2027, which means there is time to plan the upgrade rather than rush it. If your PC is supported, upgrading on a quiet weekend, following the planning steps above, is the easy path. If your PC is not supported, the ESU program keeps it safe while you decide what to replace it with; our guide to Windows 11 supported processors explains which PCs qualify.

Whatever you decide, the upgrade itself is not the hard part; finding a few quiet hours is. Booking the restart for an evening and letting the download happen during the day, as Ethan did, removes most of the inconvenience. If you have several PCs at home, upgrade one first, live with it for a week, then do the rest, so any surprises only affect one machine.

Upgrading a PC with a hard drive

Older PCs and some budget laptops still use mechanical hard drives, and they are the reason many people remember upgrades taking all afternoon. A hard drive has to physically move to read and write each file, so the thousands of small file operations in an upgrade take much longer. Expect two to four hours for a Windows 10 to 11 upgrade, and longer if the drive is nearly full or fragmented with years of use.

If the PC is otherwise capable of Windows 11, replacing the hard drive with an SSD before upgrading is one of the best investments you can make: the upgrade is faster, and so is everything afterward, from startup to opening apps. Many people do a clean installation onto the new SSD instead of upgrading, which takes 20 to 45 minutes plus time to reinstall apps and copy files back. Ethan's spare-room laptop took three and a half hours on its hard drive; after Jake fitted an inexpensive SSD a month later, its monthly updates went from half an hour to a few minutes.

Upgrading several PCs at home

A household with three or four PCs can save a lot of time by planning the upgrades together. Start with the least important PC, upgrade it, and use it for a few days. Any problem with a printer, an app or a shared device shows up there first, and you can solve it before it affects the PC everyone depends on.

To avoid downloading the upgrade several times on a slow connection, download the Windows 11 ISO once, copy it to a USB drive or a shared folder, and run setup.exe from it on each PC. Or make one Media Creation Tool USB drive and carry it from PC to PC. Each PC still needs its own install time, but the download happens only once, and you can start one PC's upgrade while another is finishing.

Jake's tip is to write a short list for each PC before starting: which apps matter on it, which devices it uses, and who signs into it. After each upgrade, he works through the list item by item and only then moves on to the next PC. The habit sounds fussy, but it catches the one family member whose scanner stopped working before they discover it on a deadline.

Work and school PCs

PCs managed by an employer or school are different. Upgrades to Windows 11, and the timing of feature updates, are usually controlled by the organization's IT department through management tools, so the upgrade may not be offered on your schedule, or it may be applied automatically at a time IT chooses. The time each upgrade takes is similar to a home PC, but extra steps such as policy and app installation after the upgrade can add some time to the first sign-in.

If your work PC shows an upgrade or a restart deadline, the easiest approach is to save your work and let it run at the end of a day, since IT usually expects that. If you have questions about timing, or if the upgrade fails, contact your IT department rather than trying fixes yourself; managed PCs often have settings that make home troubleshooting steps unsuitable.

Clean installation versus upgrade: which is faster?

A clean installation, erasing the drive and installing Windows 11 from a USB drive, is faster than an upgrade for the Windows part: typically 20 to 45 minutes on an SSD. But it is not faster overall, because afterward you must reinstall every app, restore files from backup and set everything up again, which takes hours. An upgrade keeps all of that, so even though the Windows part takes longer, you finish sooner.

A clean installation is worth the extra work when the PC is slow or unreliable on its current Windows, when moving to a new drive, or when you want a fresh start without old software. Our guide to reinstalling Windows while keeping your files covers the in-between options, such as a repair install, which reinstalls Windows over itself while keeping files and apps, and takes about as long as an upgrade.

A Windows upgrade is less of an ordeal than its reputation suggests, as long as you know what to expect: most of the work happens in the background, the part that stops you lasts about an hour on a modern PC, and a slow percentage is usually a working one. Plan the restart for a convenient time, keep laptops plugged in, and leave the PC alone afterward for an hour. Ethan's family PC was back in use by mid-afternoon, and the slow old laptop now has an SSD.

Revision note. Written October 3, 2026, updating our 2016 guide to how long a Windows 10 upgrade takes into a complete guide for Windows 11. It covers times for every kind of upgrade and update, the stages of a Windows 10 to 11 upgrade, what slows it down, monthly and version updates, how to tell slow from stuck, planning, hard drives, and clean installation versus upgrade. Times are typical ranges for reasonably modern PCs; yours may differ. May your next upgrade finish before your coffee does.