Checklists for software errors, setup, and tool workflows.

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Fix Windows Search 502 Bad Gateway Error

If you see a "502 Bad Gateway" error when using Windows Search (e.g., in File Explorer or the Sta...

Fix Windows Update Connection Refused Due to Proxy Settings

When Windows Update reports a 'connection refused' error, it's often due to a misconfigured proxy...

Fix Windows Defender Network Error in Configuration Tool

When you open the Windows Defender Configuration Tool and see a network error, it usually means t...

Fix Windows Defender Token Expired Group Policy Error

You may see a Windows Defender error like 'Token expired' or 'The token is expired' in the Window...

Fix PostgreSQL Connection Refused Due to pg_hba.conf

When a client gets 'connection refused' from PostgreSQL, the first thing to check is the pg...

Fix 'Command Prompt Not Found' Error After Windows Update
After a Windows update, you might see a '404 not found' error when trying to open Command Prompt,...