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

How to Fix Chrome DNS Errors in Your Profile

You're browsing in Chrome and suddenly see an error like "DNS_PROBE_FINISHED_NXDOMAIN" or "ERR_NA...

Jupyter Kernel Dead: Common Causes and Fixes

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

How to Fix Windows Defender Blank Screen Issue

If you open Windows Defender (now called Windows Security) and see only a blank white or black sc...

Fix Microsoft Store Token Expired Not Syncing Error

You open Microsoft Store and see a message that your token has expired, or apps won’t sync purcha...

Fix 'PowerShell Not Recognized as Internal or External Command'