Windows Update Stuck at 100%? How to Fix It (Windows 11 and 10)

An update that sits at 100% (or "Working on updates 100% complete. Don't turn off your computer") is usually still finishing work in the background: cleaning up old files, applying settings or preparing the next restart. Most of the time it completes on its own. When it really is stuck, the fixes below get you back into Windows without losing your files.

First: how long should you wait?

Situation	What to do
Under 1 hour at 100%	Wait. Large feature updates often pause at 100% while they finish.
Drive light still blinking, or disk/fan activity	It's still working. Give it up to 2–3 hours, plugged into power.
2–3 hours with no activity at all	Safe to force a restart (next section).
Stuck again after restarting	Use the Windows Recovery fixes below.

Keep a laptop plugged in the whole time. Running out of battery mid-update is what actually causes damage.

Fix 1: Force a restart the safe way

1. Unplug USB drives, printers, docks and other accessories. They're a common cause of updates hanging.
2. Hold the power button for about 10 seconds until the PC turns off.
3. Wait 30 seconds, then press the power button once.

Windows will usually either finish installing or undo the update ("We couldn't complete the updates. Undoing changes"). Let that finish; it can take a while too.

Fix 2: Use Windows Recovery (if Windows won't start)

If the PC goes back to the stuck screen or won't reach the desktop, Windows opens the recovery environment (WinRE) after two or three failed starts. You can trigger it by forcing the PC off during startup twice. Then go to Troubleshoot → Advanced options and try these in order:

1. Uninstall Updates → Uninstall latest quality update (monthly update) or latest feature update (yearly version upgrade). This is the most effective fix for a bad update.
2. Startup Repair, which fixes common boot problems automatically.
3. Startup Settings → Restart → 4 (Safe Mode). If Windows starts in Safe Mode, restart normally; the update often completes.
4. System Restore, to go back to a restore point from before the update, if one exists.

If WinRE won't open, boot from a Windows USB installer and choose Repair your computer. See also our guide on repairing Windows without a CD.

Fix 3: Once you're back in Windows, repair Windows Update

Run the Windows Update troubleshooter

In Windows 11, go to Settings → System → Troubleshoot → Other troubleshooters → Windows Update → Run. On current Windows 11 versions this opens the Get Help app, which replaced the old troubleshooters. In Windows 10: Settings → Update & Security → Troubleshoot → Additional troubleshooters.

Free up disk space

Updates need room to unpack. If drive C: has less than about 20 GB free, use Settings → System → Storage → Cleanup recommendations or Disk Cleanup.

Repair system files

Open Terminal (Admin) or Command Prompt as administrator and run:

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

Restart when both finish.

Reset the Windows Update cache

A corrupt download in the update cache makes the same update fail again and again. In an admin terminal:

net stop wuauserv
net stop bits
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
net start wuauserv
net start bits

Then check for updates again. Windows downloads a fresh copy.

Fix 4: Reinstall Windows with Windows Update (keeps your files)

Windows 11 has a built-in repair that reinstalls your current version of Windows through Windows Update while keeping your apps, files and settings: Settings → System → Recovery → Fix problems using Windows Update → Reinstall now. Keep the PC plugged in and online. It's available on Windows 11 version 22H2 or later with recent updates installed.

On Windows 10, or if that option is missing, the Windows 11 Installation Assistant or Media Creation Tool can do an in-place upgrade that also keeps files and apps.

Other "stuck" screens

Where it's stuck	Usual cause	Fix
0% (download not starting)	Windows Update service, network, or full cache	Restart, check internet, reset the update cache (Fix 3)
A % in the middle (e.g. 35%, 61%)	Slow drive or large update	Wait 1–2 hours, then force restart
"Restarting" with a spinning circle	Driver or device conflict	Unplug accessories, force restart, Safe Mode
"Undoing changes" loop	Update can't install	WinRE → Uninstall Updates; reset cache

Is it safe to turn off the PC during an update?

Only as a last resort. Turning it off while files are being written can leave Windows unable to start. That's why the recommendation is to wait for 2–3 hours of no activity first. If it does happen, the recovery steps in Fix 2 usually repair it.

Still on Windows 10?

Windows 10 reached end of support on 14 October 2025. Without Extended Security Updates it no longer gets security patches. If your PC meets the requirements, moving to Windows 11 avoids update problems on an unsupported system.

Pausing updates for now

If you need the PC for something urgent, you can pause updates: Settings → Windows Update → Pause updates (up to several weeks). Don't leave them paused for long; security fixes matter.

FAQ

Why is my Windows update stuck at 100%?

It's usually finishing post-install tasks. Real hangs come from a corrupt update download, a driver or accessory conflict, low disk space or a failing drive.

How long can a Windows update take?

Monthly updates usually take minutes; yearly feature updates can take an hour or more on older PCs with hard drives.

Will I lose my files if I force restart?

Your personal files are normally safe. The risk is to Windows itself, which the recovery options can usually fix.

How do I stop a Windows update that's in progress?

You can't cancel it safely once installation has started. Let it finish or roll back, then pause updates in Settings.

Related guides

• Microsoft Windows 10 Updates Failed to Install
• How to Repair Windows 10 Without CD Using Command Prompt?
• Windows Cannot Be Installed to This Disk: How to Fix?
• How to Fix Computer Slowness? Ways to Speed Up Performance
• Laptop Black Screen on Startup? How to Find the Cause and Fix It