Setup Environment Variables to Fix Command Not Found
You type a command you know is installed, but the shell replies: command not found. ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Defender Permission Denied on Scan
If you see a 'Permission Denied' message when running a Windows Defender scan, it usually means t...
Fix Windows Search Not Showing Results Due to Permission Errors
You type a query into the Start menu or File Explorer search box, but no results appear—or only p...
Fix Windows Search After Disabling Cortana
If you've disabled Cortana and find that Windows Search no longer returns results or runs slowly,...
Outlook Authentication Failed: Checklist to Verify Credentials
You open Outlook, try to send or receive email, and get an error: authentication failed
Fix OneDrive Not Signing In Due to Network Firewall
You try to sign in to OneDrive, but it fails with a network error. Often, a firewall—on your comp...
Topic paths
Quick titles
Chrome Profile Restore from Backup: Step-by-Step GuideCommand Line Method to Reset Windows Update CacheStep-by-Step Checklist for Defender Update ErrorsWindows Activation Prompt at Startup FixFix Chrome 'Unable to Open Profile' ErrorHow to Resolve Store 502 Bad GatewayHow to Fix Windows Security Invalid Configuration ErrorWindows Offline Installer Not Detecting Product Key: Solutions