Windows Security Troubleshooting Guide
Windows Security (formerly Windows Defender) usually runs quietly in the background, but sometime...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Search 504 Gateway Timeout Due to Antivirus Interference
If you're seeing a "504 Gateway Timeout" error when using Windows Search—especially when searchin...
Fix OneDrive File Locked by System Process
You try to edit or delete a file in OneDrive, but Windows reports it's locked by a system process...
How to Fix Windows Defender Firewall Blocked App
You try to open an app, but it either won't start or can't connect to the internet. A common caus...
How to Add External Drives to Windows Search Index
If you've connected an external USB drive and Windows Search can't find files on it, the drive is...
How to Fix Git Pull Merge Conflicts: Error Code 1
When you run git pull and see a merge conflict error, Git stops the merge. The error...
Topic paths
Quick titles
Reset Expired Windows Activation Token Using Command LineFix Microsoft Teams 'File Locked' Error When EditingCommand Prompt Fixes: A Step-by-Step ChecklistHow to Solve Proxy Not Working in CMDFix Windows Activation Proxy Server Not RespondingMicrosoft Teams Timeout Fix Windows 10Windows Search Service Won't Start Error 1068Resolve Windows Security Threat History Connection Timeout