Windows 11 updates usually take 20 minutes to an hour on a modern computer, but can stretch to several hours if your machine is older, full, or running the update for the first time

The time depends on three things: how much free space your drive has, how fast your internet connection is, and whether Windows has to restart your computer. A routine monthly update on a reasonably fast machine with plenty of free space finishes in under an hour. A major version update — the kind that happens once or twice a year and changes how Windows looks or works — can take two to four hours, including restart time.

The update process itself has stages, and each one takes different amounts of time. Windows downloads the update files first, which depends on your internet speed. Then it installs them, which depends on your drive speed and how much work your processor has to do. Finally, it restarts your computer one or more times, which is usually quick but can feel long if you are waiting to use your machine.

If you see an update stuck on the same percentage for 10 minutes or more, that is usually normal — Windows is working on something in the background and the progress bar just is not updating. The real problem signs are a black screen that does not change for over an hour, or an error message that appears and does not go away.

Key Takeaways

  • Monthly security updates on a modern computer typically finish in 20 to 60 minutes, including any restarts.
  • Major version updates can take two to four hours because they change more of the system and usually require multiple restarts.
  • A full or nearly full hard drive can double or triple update time because Windows needs space to work with temporary files.
  • A slow internet connection only slows the read phase; if you already have the files, speed depends on your drive and processor, not your connection.
  • Updates that appear frozen for 10 minutes are usually still working — the progress bar just stops updating while Windows installs files in the background.

What happens during each stage of an update

Windows breaks the update into distinct phases, and understanding them helps you know whether something is actually wrong. The read phase comes first. Windows connects to Microsoft's servers and pulls the update files to your computer. On a fast internet connection (50 Mbps or faster), this takes a few minutes for a monthly update. On a slower connection (10 Mbps or less), it can take 15 to 30 minutes. This is the only phase where your internet speed matters.

The installation phase comes next, and this is where most of the time goes. Windows unpacks the files it downloaded, checks them against what is already on your computer, and writes the new versions to your drive. This phase depends almost entirely on your drive speed and how much free space you have. A solid-state drive (SSD) does this much faster than an older hard disk drive (HDD). If your drive is nearly full, Windows has to shuffle files around to make room, which slows everything down significantly.

The restart phase is last. Windows shuts down, applies any final changes that require the system to be offline, and boots back up. This usually takes 5 to 15 minutes. Major updates sometimes require two or three restarts, which adds time. You will see a message on your screen during this phase, and your computer will be unusable until it finishes.

How to check what kind of update is coming

Not all updates take the same amount of time, and you can see in advance which type you are getting. Open Settings by pressing the Windows key and typing "settings", then click System and then About. Look for "Windows Update" and click "Check for updates". Windows will show you what is available.

If the update is labeled as a monthly security update or a cumulative update, expect 20 to 60 minutes. These happen roughly once a month and are usually small. If it says something like "Version 23H2" or "Version 24H2", that is a major version update and plan for two to four hours. These happen one or two times a year and change more of how Windows works.

You can also see how much free space you have right now. In Settings, go to System, then Storage. Look at the bar at the top — if the blue or gray section takes up more than 80 percent of the bar, your drive is too full and the update will be slow. Deleting old files, emptying the Recycle Bin, or moving photos and videos to an external drive will speed things up.

Why updates take longer on older computers

An older computer does not just take longer — it can take dramatically longer. A computer from 2015 with a traditional hard drive might take four to six hours for a major update, while a new computer with an SSD finishes in two hours. The difference comes down to drive speed and processor power.

Hard disk drives (the kind that spin) are much slower than solid-state drives (the kind with no moving parts). A hard drive might read and write at 100 to 150 megabytes per second, while an SSD reads and writes at 500 to 3,500 megabytes per second. When Windows is installing hundreds of megabytes of files, that speed difference adds up to hours.

Older processors also slow down the installation phase because they have to verify and process each file. A processor from 2015 might take twice as long to do the same work as a processor from 2023. If your computer is more than six or seven years old and still has a hard drive, plan for a long update and make sure you have several hours free and a full battery or a power cord plugged in.

What to do while an update is running

You cannot use your computer while Windows is updating, so plan accordingly. Close all your programs before the update starts. If you have unsaved work, save it first — Windows will remind you, but it is better to be sure.

Do not turn off your computer or unplug it while the update is running, even if it seems frozen. Stopping an update in the middle can damage Windows and make your computer unable to start. If you absolutely must stop it, wait until you see a restart message, then you can safely shut down during the restart phase.

The best time to start an update is in the evening or when you do not need your computer for a few hours. Windows will usually offer to schedule the update for a time you choose, or you can start it manually. If you start it manually, Windows will ask you to restart — you can delay the restart for a few hours if you need to finish something, but the update will eventually require a restart to complete.

When updates take much longer than expected

Most updates finish within the time ranges described here, but some take much longer. The most common reason is a full or nearly full hard drive. If your drive has less than 10 percent free space, Windows cannot work properly and the update slows to a crawl. Delete files, uninstall programs you do not use, or move large files to an external drive before trying again.

A slow internet connection can also extend the read phase significantly. If you have a connection slower than 5 Mbps, a major update might take an hour just to read. Moving your computer closer to your router, restarting your router, or waiting for a time when fewer people are using your internet can help.

Occasionally, an update gets stuck or fails partway through. If you see the same percentage on the progress bar for more than 30 minutes, or if you see an error code, restart your computer and try the update again. Windows usually picks up where it left off. If it fails a second time, the problem might be with your internet connection or your drive, and you may need to contact Microsoft support or take your computer to a technician.

How to speed up a slow update

If your update is taking longer than expected, a few things can help. First, free up drive space. Delete files from your Downloads folder, empty the Recycle Bin, and uninstall programs you do not use. Aim for at least 20 percent free space on your drive.

Second, close any programs that are running in the background. Some antivirus software and backup programs can slow down updates. Temporarily disable them if you know how, or restart your computer in Safe Mode (press F8 while your computer is starting up) to run the update with fewer background programs.

Third, make sure your internet connection is stable. If you are using Wi-Fi, move closer to your router or plug in an ethernet cable if you have one. Restart your router by unplugging it for 30 seconds and plugging it back in.

Finally, be patient. The progress bar sometimes stops moving for 10 or 15 minutes while Windows works on something in the background. As long as your computer is not completely frozen and you do not see an error message, it is probably still working.

Frequently Asked Questions

Can I use my computer while Windows is updating?

No. Windows will lock your computer during the update and you will not be able to open programs or files. The update needs your computer's full attention to install correctly. You can use another device while you wait.

What if I restart my computer during an update?

Do not do this. Restarting or unplugging your computer during an update can corrupt Windows and make your computer unable to start. If the update is truly stuck (same screen for over an hour with no error message), hold the power button for 10 seconds to force a shutdown, then restart. Windows will usually resume the update on the next startup.

Why does my computer restart multiple times during an update?

Major updates often require two or three restarts because Windows needs to explore changes at different stages of the startup process. Each restart is normal and part of the update. Do not turn off your computer between restarts — just wait for it to boot back up.

Does a faster internet connection make updates finish faster?

Only for the read phase. Once Windows has the files, the rest of the update depends on your drive speed and processor, not your internet. If you have a reasonably fast connection (20 Mbps or faster), internet speed is not the bottleneck.

Should I plug in my laptop before starting an update?

Yes. Updates use a lot of power and can take hours. If your battery runs out during an update, your computer might shut down unexpectedly and damage Windows. Always plug in before starting an update, even if your battery is full.