Checklists for software errors, setup, and tool workflows.

Fix Nginx Config Test Fails with 'upstream host not found'

You run nginx -t and get upstream host not found. The config test fails...

Fix Microsoft Store Not Launching from Start Menu

You click the Microsoft Store icon in the Start Menu, but nothing happens—no window, no error. Th...

Fix Chrome Profile 502 Bad Gateway After Update

If you're seeing a 502 Bad Gateway error in Chrome immediately after a browser update, it often p...

How to Fix Conda Solve Environment Failed Network Timeout

If you see 'CondaHTTPError: HTTP 000 CONNECTION FAILED' or 'SolveEnvironment: failed' with a netw...

Fix SSL Certificate Errors in Windows Search

When Windows Search throws an SSL certificate error—often as 'The certificate is not valid' or 'A...

Fix Microsoft Teams Microphone Not Detected in Windows

Common Causes

• Microphone permissions disabled for Teams in Windows settings.