Windows Update Stuck at 0% or 100%: How to Fix It

A stuck Windows Update — frozen at 0%, 32%, or 100% for hours — is one of the most frustrating Windows problems. Here's how to unstick it.

Step 1: Wait (Seriously)

Some updates genuinely take a long time. Before doing anything:

0% for under 30 minutes — wait, especially on slow internet
Installing at a fixed percentage for under 2 hours — wait, some updates process slowly
Stuck for over 3 hours with no disk activity — proceed with fixes below

Check disk activity: if the drive light is blinking or Task Manager shows disk usage — it's still working.

Step 2: Restart and Try Again

Sometimes a single restart unsticks the update.

Start → Update and Shut Down (not just Restart) — this lets pending updates apply during shutdown.

If it freezes during restart: hold the power button for 10 seconds to force off, then start normally. Windows will usually detect the interrupted update and retry.

Step 3: Run Windows Update Troubleshooter

Win + I → System → Troubleshoot → Other troubleshooters → Windows Update → Run

This automatically detects and fixes common update issues — corrupted cache, stopped services, permission errors.

Step 4: Reset Windows Update Components

The most reliable manual fix:

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver

ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 catroot2.old

net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Run as Administrator. This clears the update cache and forces a fresh download.

Step 5: Clear the Update Queue

If updates are queued but stuck:

# Stop Update service
Stop-Service wuauserv -Force

# Delete downloaded update files
Remove-Item "C:\Windows\SoftwareDistribution\Download\*" -Recurse -Force

# Restart service
Start-Service wuauserv

# Trigger update check
(New-Object -ComObject Microsoft.Update.AutoUpdate).DetectNow()

Step 6: Fix with DISM and SFC

Corrupted system files often cause stuck updates:

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

Run DISM first — it repairs the component store that SFC relies on. Restart after both complete.

Step 7: Manually Download the Update

If a specific update keeps failing:

Note the KB number from Windows Update → Update history
Go to catalog.update.microsoft.com
Search for the KB number
Download the .msu file for your Windows version and architecture
Run it directly — bypasses Windows Update entirely

Step 8: Use Media Creation Tool

If nothing works and you're stuck on an old version:

Download Windows 11 Installation Assistant from microsoft.com/software-download/windows11 → run → choose Update now.

This performs an in-place upgrade — updates Windows without touching your files.

Stuck at "Getting Windows ready" Screen

This appears after updates install. If stuck for over an hour:

Don't force restart if the drive light is active — it may be writing
After 2+ hours with no disk activity: force restart (hold power button)
Windows usually recovers and either continues or rolls back

If it boot-loops after forced restart: boot from USB → Repair your computer → Startup Repair

Prevent Future Stuck Updates

# Check Windows Update service is set to automatic
Get-Service wuauserv | Select-Object Name, StartType, Status

# Ensure BITS service is running (downloads updates in background)
Get-Service bits | Select-Object Name, StartType, Status

Keep at least 10 GB free on C: — updates need space to download and extract.

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Summary

In order: wait 2+ hours → restart → run troubleshooter → reset update components (net stop wuauserv then rename SoftwareDistribution folder) → DISM + SFC → manual KB download. The component reset (Step 4) fixes the majority of stuck update cases.