Enable Windows Security Manually When It Fails to Start
If Windows Security (formerly Windows Defender) fails to start, you may see an error like "This a...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Chrome ERR_TUNNEL_CONNECTION_FAILED Error
When you see "ERR_TUNNEL_CONNECTION_FAILED" in Chrome, it usually means your browser can't establ...
Fix Remote Desktop Credentials Permission Denied Error
You try to connect to a remote Windows machine via RDP, enter your username and password, but get...
Fix Windows Security 'Permission Denied' Error When Settings Won't Open
You click Windows Security (formerly Windows Defender) and get a "Permission denied" or "This set...
Fix Microsoft Teams Authentication Loop Issue
You sign in to Microsoft Teams, but instead of loading, it keeps prompting you to sign in again. ...
Fix Outlook Port Already Allocated Error from Antivirus
If you see an error like "The connection to Microsoft Exchange is unavailable. Outlook is using p...
Topic paths
Quick titles
Windows Update Module Not Found Error FixTroubleshooting Remote Desktop Blank Screen Due to LatencyTroubleshoot Windows Activation DNS ProblemWindows 10 Task Scheduler Log Location GuideFix SSL Certificate Problem in Windows SearchResolve OneDrive Sync Error 0x8007016aEnable Task Scheduler via Command Line in Windows 10Resolve Microsoft Teams Access Denied Quickly