A Windows 11 update usually takes 20 minutes to an hour on a modern computer, but can stretch to several hours if your machine is older, full, or running on a slow internet connection

The time depends on three things: how much free space you have, how fast your internet is, and what else your computer is doing. Microsoft does not publish exact timings because the process changes with each update. A routine monthly patch on a newer laptop with a fast connection might finish in 20 minutes. The same update on a five-year-old desktop with a nearly full hard drive and a slow connection could take three to four hours, and you will not be able to use your computer during most of that time.

The update process has stages, and each one takes different amounts of time depending on your setup. Understanding what happens at each stage helps you plan around the downtime and know whether something has actually stalled or is just moving slowly.

Key Takeaways

  • Monthly security updates typically take 20 minutes to an hour; major feature updates can take two to four hours or longer.
  • Your computer will restart multiple times during the update, and you cannot use it during the installation phase.
  • Having at least 10 to 15 gigabytes of free disk space and a stable internet connection cuts update time significantly.
  • If an update stalls for more than two hours on the installation phase, restarting your computer and checking your internet connection usually fixes it.

What happens during each stage of a Windows 11 update

Windows 11 updates move through distinct phases. First comes the read phase, where Windows pulls the update files from Microsoft's servers. On a fast connection (25 megabits per second or faster), a typical monthly update downloads in five to ten minutes. On slower connections, this can take 30 minutes or more. During this phase, you can still use your computer normally.

Next is the preparation phase, where Windows checks your system, backs up critical files, and gets ready to install. This usually takes five to fifteen minutes and also allows normal computer use. Then comes the installation phase, where Windows actually applies the changes. This is when your computer becomes unusable — you will see a progress bar and possibly multiple restarts. Installation typically takes 10 to 30 minutes for a monthly update, but 45 minutes to two hours for a major feature update released twice a year.

Finally comes the cleanup phase after the last restart, where Windows removes temporary files and finishes configuration. This can take another 5 to 15 minutes, though your computer is usually usable during this time, just slower than normal.

Why older computers and full hard drives take much longer

A computer with less than 10 gigabytes of free space will take significantly longer to update because Windows needs room to read the update files, create a backup of your current system, and stage the installation. If you have only 5 gigabytes free, Windows may pause the update to clean up temporary files, adding 30 minutes or more to the total time. Checking your free space before starting an update prevents this delay.

Older computers with slower processors and older hard drives (not solid-state drives) take longer at every stage. A computer from 2015 might take three to four hours for a major update where a 2021 model takes 90 minutes. Solid-state drives are significantly faster than traditional spinning hard drives, so upgrading to an SSD is one of the few hardware changes that noticeably speeds up Windows updates.

How internet speed affects read and installation time

The read phase depends almost entirely on your internet speed. A 100-megabit connection downloads a typical monthly update in two to three minutes. A 10-megabit connection takes 20 to 30 minutes. If you are on satellite internet or a mobile hotspot, the read can take an hour or more. The installation phase is less affected by internet speed, but Windows still needs a stable connection to verify files and pull any additional components it needs.

If your internet drops during the read phase, Windows will pause and resume when the connection returns. If it drops during installation, the update may fail and roll back to your previous version. For this reason, it is worth waiting for a stable connection before starting a major update, or scheduling it for a time when you know your network is reliable.

When to expect the longest updates

Twice a year, usually in spring and fall, Microsoft releases major feature updates that are substantially larger than monthly patches. These updates can include new features, interface changes, and significant system modifications. A feature update can take two to four hours on a modern computer and four to six hours on an older one. Monthly security updates, by contrast, are usually 100 to 300 megabytes and take 20 minutes to an hour.

You can see which type of update is coming by opening Settings, going to System, then About. Look for the Windows version number. If it is about to change (for example, from 23H2 to 24H2), a major feature update is coming. If only the build number changes, it is a monthly patch. Knowing this in advance lets you schedule the update for a time when you do not need your computer.

What to do if an update seems stuck

If the installation phase has not progressed in more than two hours, the update may have stalled. First, check that your internet connection is still active by opening a browser or pinging a website. If the connection is down, reconnect and wait — Windows will resume. If the connection is fine but nothing has changed in 30 minutes, restart your computer by holding the power button for 10 seconds.

When you restart, Windows will usually resume the update from where it left off. If the update fails and rolls back, you will see a message saying the update could not be installed. In that case, restart again and try the update once more. If it fails a second time, check that you have at least 15 gigabytes of free space, close any open programs, and try again. If it continues to fail, you may need to contact Microsoft Support or visit a local computer repair shop, though this is rare.

How to prepare your computer for faster updates

Before a major update, delete files you no longer need and empty your Recycle Bin. Aim for at least 15 gigabytes of free space. Close all open programs, including web browsers, email, and anything running in the background. Disable any external hard drives or USB devices you do not need for the update. Plug in your laptop if you are using one — updates can fail if the battery runs out mid-installation.

Schedule the update for a time when you will not need your computer for at least two hours. If you are on a metered internet connection (such as a mobile hotspot with a data limit), wait until you have access to an unmetered connection, as major updates can use 2 to 4 gigabytes of data. These steps do not may provide a faster update, but they eliminate the most common causes of delays and failures.

Frequently Asked Questions

Can I use my computer while Windows 11 is updating?

During the read and preparation phases, yes. During the installation phase, no — your computer will be locked and show a progress bar. You can use it again after the final restart, though it may be slow for 10 to 15 minutes as Windows finishes cleanup.

Do I have to restart my computer during the update?

Yes, Windows will restart multiple times — usually at least twice. You cannot prevent this. If you have unsaved work, save it before the update begins, because Windows will close all open programs during installation.

What if the update fails and rolls back?

Your computer will return to the previous version of Windows, and you will see an error message. Restart your computer, check that you have 15 gigabytes of free space, and try the update again. If it fails a second time, contact Microsoft Support.

Is it safe to turn off my computer during an update?

No. Turning off your computer during installation can corrupt your system and make Windows unbootable. If the update seems stuck for more than two hours, hold the power button for 10 seconds to force a restart, but do not do this unless you are certain it has stalled.

Why does Windows update so often?

Monthly updates patch security vulnerabilities that hackers discover. Feature updates add new capabilities and improve performance. These updates are how Windows stays find and functional. You cannot skip security updates without leaving your computer vulnerable.