How to Fix Windows Slow After Update on Windows
PC running slow after a Windows update? Fix post-update performance issues including sluggish boot, high resource usage, and unresponsive apps.
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Main Troubleshooting Guide
How to Fix Slow Computer →Complete symptoms, causes, and step-by-step solutions
Symptoms
You might be experiencing this problem if you notice:
- •Computer noticeably slower after Windows Update
- •Boot time increased significantly
- •High CPU or disk usage after update
- •Apps take longer to open than before
- •System becomes unresponsive for minutes after login
- •Background processes consuming resources post-update
Common Causes
- ⚠Windows re-indexing files after update
- ⚠New update installing additional components in background
- ⚠Driver incompatibility with new Windows version
- ⚠Windows Update cache consuming disk space
- ⚠Corrupted update leaving system in inconsistent state
- ⚠Compatibility telemetry running post-update
Solutions
Solution 1: Wait and Let Background Tasks Complete
- 1After a major update, Windows needs 30-60 minutes to settle
- 2Let your PC sit idle with power connected
- 3Check Task Manager — look for Windows Modules Installer Worker
- 4If disk usage is high from SearchIndexer, let it complete
- 5Restart after background tasks finish
Solution 2: Clear Windows Update Cache
- 1Open Command Prompt as Administrator
- 2Run: net stop wuauserv
- 3Run: del /f /s /q C:\Windows\SoftwareDistribution\Download\*
- 4Run: net start wuauserv
- 5Go to Settings > System > Storage > Temporary files
- 6Check and delete "Windows Update Cleanup"
Solution 3: Uninstall the Problematic Update
- 1Go to Settings > Windows Update > Update history
- 2Click "Uninstall updates"
- 3Find the most recent update
- 4Click Uninstall and confirm
- 5Restart your computer
- 6Pause updates for 7 days while waiting for a fix
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