How to Enable Windows Defender After It Failed to Start
If Windows Defender won't start, you may see an error like "This app has been turned off" or "Win...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Microsoft Store Not Opening on Boot
If the Microsoft Store fails to launch when Windows starts, you may see no window at all or an ap...
Fix Windows Security Path Not Found Error
When you try to open Windows Security (formerly Windows Defender Security Center) and see a messa...
Microsoft Store Not Downloading Apps: Fixes That Work
When the Microsoft Store refuses to download apps, you'll usually see a spinning circle, stuck pr...
Fix Remote Desktop Not Working After Windows Update
After a Windows update, Remote Desktop may stop connecting, fail to authenticate, or drop session...
Fix Windows Activation Login Loop Not Accepting Password
You're stuck in a login loop after a Windows activation or update. You type your password correct...
Topic paths
Quick titles
Microsoft Teams Update Error Service Unavailable FixHow to Resolve Windows Error 0x80070520Windows Security Not Opening: Practical Fixes That WorkSet Custom DNS Servers for Windows TerminalWindows 11 Store Log File PathHow to Fix Windows Update High Memory UsageTroubleshoot Windows Terminal settings.json ErrorsHow to Fix Outlook Error 0x800CCC0F