Fix 'Windows Security App Not Installed' on Windows 10
You open the Start menu, search for Windows Security, and nothing shows up. Or you see a message ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listResolving PowerShell Version Mismatch Errors
When you encounter a PowerShell version mismatch error, it typically appears as a message indicat...
Fix Windows Defender Version Mismatch Sync Errors
You see a message that Windows Defender definitions are out of sync, or that the client and serve...
Fix Windows Defender Can't Connect to Internet Error
If Windows Defender shows “Can’t connect to the internet” or similar errors, it usually means the...
Fix Windows Search Indexing Error 0x80070005
When Windows Search indexing stops with error 0x80070005, it usually means the indexing service c...
Check for Malware When Windows Activation Causes High CPU Usage
If your computer's CPU usage spikes after a Windows activation attempt, malware may be the culpri...
Topic paths
Quick titles
Command Prompt Network Diagnostics GuideRemote Desktop Token Expired Permission Denied FixHow to Resolve Teams DNS Permission DeniedFFmpeg Audio Desync Troubleshooting GuideHow to Resolve Chrome Sync Errors After a Browser UpdateOutlook Email Sync Error on Ubuntu: Troubleshooting GuideResolve Windows Update Port Already in UseRate Limit Error in CMD: Causes and Solutions