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

Fix Windows 11 Activation Access Denied Error

You try to activate Windows 11 but get an 'access denied' error. This usually means the activatio...

BitLocker TPM Not Detected After Settings Reset: Fix

If you recently reset Windows settings or performed a system restore and now BitLocker reports th...

Jupyter Kernel Connection Error: Causes and Fixes

You start a Jupyter notebook, try to run a cell, and see a message like "Kernel error" or "Connec...

Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Error

When you see "ERR_TUNNEL_CONNECTION_FAILED" in Chrome, it usually means your browser can't establ...

Fix Microsoft Store 404 Not Found Error on Reinstall