How to Fix Windows Defender Service Not Running
If you see a message that Windows Defender is not running or the security center shows it's off, ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listBitLocker Recovery Key Not Accepted: 504 Error Fix
You enter your BitLocker recovery key, but get a 504 error. The key is not accepted. This usually...
Fix PowerShell Command Not Recognized in Windows 11
You type a PowerShell command and get 'not recognized as the name of a cmdlet, function, script f...
Fix DNS Probe Finished NXDOMAIN on Android Chrome
When you see DNS_PROBE_FINISHED_NXDOMAIN in Chrome on Android, it means the brow...
Fix Windows Security Dependency Conflict Error – Setup Guide
You're installing or updating Windows Security (formerly Windows Defender) and get an error about...
Fix Windows Security Not Starting Due to Third-Party Antivirus
If Windows Security (formerly Windows Defender) refuses to start or shows a blank screen, a third...
Topic paths
Quick titles
Docker Compose Network Setup GuideFix Chrome Extensions That Fail After Browser RestartTroubleshooting Windows Security File Lock IssuesHow to Speed Up Windows Update PerformanceWindows 10 Task Scheduler Not Running? Fix It HereFix Windows Defender Connection Errors: ChecklistFix Missing Task Scheduler Log Files in WindowsWindows Update Stuck on Checking for Updates Fix