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 Update Stuck at 0% – Practical Steps

You click "Check for updates" and the progress bar sits at 0% for minutes or hours. This is a com...

Fix Task Scheduler Auto Start Not Working in Windows 11

You set up a task in Task Scheduler to start automatically at boot or on a schedule, but it never...

Fix Windows Security Network Error: Not Connecting

If you see “Windows Security network error not connecting” when trying to access network resource...

How to Clear SSH Known Hosts and Fix Host Key Verification Failed

Fix WinRAR Checksum Error After Update

After updating WinRAR, some users see a "checksum error" when opening archives that worked before...