Fix Windows Security Not Launching at Startup
You restart your PC and notice Windows Security (formerly Windows Defender) isn't running. The ic...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix 'Port Already Allocated' Error on Windows 10 for Chrome
When launching Chrome or a web app that uses Chrome, you might see an error like "Port alread...
Fix Microsoft Store Download Failed on Mac (Error Code)
If you see a download failed error in the Microsoft Store on your Mac, the error code points to a...
Fix Command Prompt Invalid Configuration After Update
After a Windows update, you might see errors like "The configuration is invalid" or "Invalid comm...
How to Enable Windows Defender Service Manually
If Windows Defender won't start or you see warnings that it's turned off, the underlying service ...
Windows Security Update Checklist Before Installing
Before you click "Install" on that Windows security update, a few minutes of preparation can save...
Topic paths
Quick titles
Troubleshoot Slow Commands in CMDRebuild Corrupt Windows Search Index: Complete GuideFix Windows Terminal Login Loop Error (Exit Code 1)Fix BitLocker 502 Bad Gateway Configuration ErrorFix 'PowerShell Path Not Found' Error in Windows 10 SetupSetup Command Prompt to Launch Automatically at StartupChrome Offline Installer Sync Troubleshooting GuideRemote Desktop Connection Timeout: RDP Port 3389 Not Working