You started a Windows update and it has been sitting at a percentage for a very long time. Or it says Downloading but the number barely moves. Or the computer restarted and has been showing a progress screen for what feels like hours. Updates should not usually take this long, and it is reasonable to wonder whether something has gone wrong.
What is probably happening
Windows updates can take longer than expected for several ordinary reasons:
- The update is large. Major Windows updates — ones that include a version upgrade rather than just security patches — can be several gigabytes and genuinely take hours, especially on slower internet connections.
- Other updates are queued. If your computer has not been updated for a long time, it may be downloading and installing multiple updates in sequence.
- The installation itself is slow. After downloading, updates install by modifying system files. On older or less powerful computers this can take a long time.
- Something has actually stalled. Occasionally an update does get genuinely stuck, particularly during the applying changes or configuring phase.
How long is too long?
Downloading phase: up to an hour or more on a slow connection is not unusual for a large update.
Installing phase (after the computer restarts): up to 30–60 minutes is normal. If your computer has been stuck at the same percentage for more than two hours without any movement at all, it may be stuck.
What is safe to try
Wait first. If the update has been running for less than two hours, the safest thing is to leave it. Interrupting an update mid-install can leave Windows in a broken state. Connect your computer to power if it is a laptop and let it run.
Check whether progress is actually stalled. Look at the screen every 10–15 minutes. If the percentage has moved even slightly, the update is still working. If it has not moved at all for more than two hours, that is a sign it may be stuck.
If it appears genuinely stuck: wait for a specific point. If the update is downloading, the download will often start again if you wait. If it is installing after a restart, look for a safe point to intervene — most installation screens have a message about whether it is safe to turn off the computer. Do not turn it off if the screen says “do not turn off your computer”.
If the computer will not respond at all: A hard restart (holding the power button until it turns off, then turning it back on) during the installation phase can cause problems. Only do this if the computer has been completely frozen — no cursor movement, no response at all — for more than an hour. Windows usually has recovery options that run automatically after an interrupted update.
After restarting from a stuck update
If Windows restarts after a stuck update, it typically shows a screen saying it could not complete the update and is undoing changes. This process can also take time. Let it finish. In most cases Windows will boot normally and you can try the update again later.
Checking update status after Windows loads
Go to Settings, then Windows Update. If updates are shown as failed, click Retry. The update system usually records what went wrong and tries the appropriate fix automatically on the next attempt. If the same update fails repeatedly, search for the update’s name or error code in Microsoft’s support pages — some updates have specific known issues with particular system configurations.
Making updates faster in future
- Keep your computer plugged in and connected to Wi-Fi at night. Windows Update can download and prepare updates in the background, so the actual installation is quicker.
- Do not delay updates for months — the more updates that accumulate, the longer the eventual catch-up will take.
- Keep enough free disk space. Updates need room to work. If your drive is nearly full, updates will be slower or may fail.
What NOT to do
- Do not force-close the update screen or frequently hard-restart during installation — this is how Windows update installations get corrupted.
- Do not disable Windows Update entirely to avoid waiting. Security updates protect you from known vulnerabilities and are genuinely important.
- Do not use your computer for other intensive tasks while an update is downloading. You can continue using it for light work, but demanding tasks slow the update down.
When to stop and seek help
If the same update fails repeatedly after multiple attempts, or if Windows boots into an error loop after a failed update that it cannot recover from on its own, professional help may be needed. In some cases Windows may need to be repaired using a recovery option, which a technician can carry out. Make sure your important files are backed up before that kind of work.
If this did not work
Microsoft’s support website has a Windows Update Troubleshooter available for download — it diagnoses and fixes common update problems automatically. Searching for “Windows Update Troubleshooter” on the Microsoft website will find the current version.
Frequently asked questions
Can I use my computer while it is updating?
During the download phase, yes — though it may be slower than usual. During the installation phase after a restart, no. The computer needs to be left to complete the process.
Why does Windows always want to update at an inconvenient time?
You can set Active Hours in Windows Update settings to tell Windows the times you typically use your computer. It will try not to restart for updates during those hours.
Do I need to update if my computer is working fine?
Yes. Security updates fix vulnerabilities that are actively used by attackers — your computer can be at risk even if everything seems to work normally. Updates that are not security-related are more optional, but generally worth applying.
My update downloaded but will not install. What does that mean?
A download succeeds but installation fails is usually caused by corrupted downloaded files or a conflict with something on the system. Retrying the update often downloads a fresh copy. The Windows Update Troubleshooter can also clear the downloaded update cache and start again.
Can a Windows update delete my files?
Major Windows version upgrades occasionally change or move things, but standard monthly updates do not delete personal files. As a general rule, keeping your important files backed up before any major update is good practice.