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

Troubleshooting WinRAR Checksum Errors

When you extract a RAR archive and see a checksum error, the file is likely damaged. This guide c...

Fix Remote Desktop Authentication Failed After Password Change

Changing your Windows password is routine, but it can break Remote Desktop connections. The error...

Fix MongoDB Authentication Failed with Role-Based Access Control

You’re trying to connect to MongoDB and getting an authentication error, even though you’re sure ...

Jupyter Kernel Not Starting in VS Code: Quick Fixes

You open a Jupyter notebook in VS Code, try to run a cell, and the kernel either hangs on "Starti...

Fix 'PowerShell Command Not Found' on Mac

If you run a PowerShell command on your Mac and see 'command not found', it usually ...

GOPROXY Environment Variable Configuration Guide