Fix Windows Update 404 Not Found Error on Windows 10
When you run Windows Update and get a "404 Not Found" error, it usually means the update server c...
Software comparisons, alternatives, and tool decision notes.
Fit
Decision
Migration
Latest comparisons
Browse labFix Windows Security Cannot Connect to the App
When you see 'Windows Security cannot connect to the app' while trying to open Windows Security o...
Fix Windows Update Error 0x80070020: File Locked
You try to install Windows updates but get error 0x80070020. This usually means another program o...
How to Clear Windows Defender Cache
If Windows Defender (Microsoft Defender Antivirus) is acting up—stuck on an old update, using hig...
How to Fix BitLocker Proxy Error During Setup
If you see a BitLocker proxy error while setting up encryption, the setup process usually stops w...
Fix Windows Defender Rate Limit Error on Windows 11
You may see a rate limit error when using Windows Defender on Windows 11. This usually happens du...