How to Fix Invalid Configuration in Command Prompt
You open Command Prompt and see an error like "Invalid configuration" or "Configuration system fa...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Microsoft Store 404 Not Found Error on Reinstall
When you try to reinstall an app from the Microsoft Store and get a 404 Not Found
Fix Windows Defender Service Not Starting (Error 0x80070422)
You try to start Windows Defender but get error 0x80070422: “The service cannot be started, eithe...
Fix PowerShell Execution Policy Error on Startup
When you try to start PowerShell and see an error like 'PowerShell failed to start because of exe...
Fix Firefox Secure Connection Failed After Update
After a Firefox update, you might see a 'Secure Connection Failed' error when visiting websites. ...
Fix OBS Black Screen with Elgato Capture Card
If you're seeing a black screen in OBS when you add your Elgato capture card as a source, you're ...
Topic paths
Quick titles
Fix Task Scheduler Token Expired ErrorHow to Fix Microsoft Store Not Loading ContentWindows Activation Cache: Location and How to DeleteWindows Search Not Showing Files: Index Rebuild and MoreFix Windows Activation Token Expiry After Hardware UpgradeWindows Security High Memory Usage Fix GuideOffline Remote Desktop Setup Using MSIExecOutlook Folder Won't Open: Troubleshooting Guide