Knowledge base for software setup, errors, and daily tool work.

Checklist for Debugging 502 Bad Gateway in Command Prompt

You're working on a web app or API, and you get a 502 Bad Gateway error. The browser just says '5...

Fix KMS Activation Error: Port 1688 Already in Use

Fix Windows Update Error 0x80070020: File Locked

You try to install Windows updates but get error 0x80070020. This usually means another program o...

Task Scheduler 502 Bad Gateway: Causes and Fixes

If you see a 502 Bad Gateway error when running a scheduled task that calls a web service or API,...

Outlook 502 Bad Gateway: Troubleshooting Checklist

If you see a 502 bad gateway error in Outlook, it usually means the server gateway is misconfigur...

Fix Windows Defender Real-Time Protection Grayed Out

You open Windows Security, go to Virus & threat protection, and see that the Real-time protection...