Windows Modules Installer Worker High CPU Fix [2026]

Quick Answer: TiWorker.exe high CPU during Windows Update. Wait for completion or run update troubleshooter.

Fix

TiWorker runs during updates - may take 30+ minutes

Settings → Troubleshoot → Windows Update → Run

Stop-Service wuauserv
Remove-Item C:\Windows\SoftwareDistribution\Download\* -Recurse
Start-Service wuauserv

Download updates manually from Microsoft Update Catalog

Againly runs check_windows_update to detect update issues.

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Instant Resolution

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Works on Windows 10 & 11 • No credit card required