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

Jupyter Kernel Dead: Common Causes and Fixes

You're working in a Jupyter notebook, and suddenly the kernel dies. The notebook becomes unrespon...

Fix Windows Terminal Alternatives Not Working on Mac

You installed a terminal emulator designed for Windows—like Windows Terminal, Cmder, or ConEmu—on...

Fix PowerShell Remote Connection Refused Error

How to Fix Cloudflare Error 521: Web Server Is Down

If you're seeing Cloudflare error 521, it means Cloudflare can't establish a TCP connection to yo...

Fix Remote Desktop Version Mismatch (RDP 8.0)

When connecting to a remote desktop, you might see an error like “The remote computer req...