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

Jupyter Kernel Stuck on Connecting: Practical Fixes

You launch a notebook, but the kernel indicator stays gray or shows “connecting” for minutes. Thi...

Fix Windows Update 504 Gateway Timeout Error

You see a 504 Gateway Timeout error when checking for Windows Updates. This usua...

Fix Chrome ERR_TUNNEL_CONNECTION_FAILED When Using VPN

Stop OneDrive from Using Too Much CPU

If your computer feels sluggish and Task Manager shows OneDrive.exe eating CPU cycles, you're not...

Fixing PowerShell Update Error 0x800f081f (DISM Source Files)

If you see error 0x800f081f when installing a PowerShell update via Windows Update o...

How to Fix pgAdmin Server Connection Refused

You're trying to connect to a PostgreSQL server via pgAdmin, but you get a "connection refused" e...