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

Fix OneDrive Token Expired Error (0x8004de40)

You open OneDrive and see an error like “Your token has expired” or code 0x8004de40. This usually...

Fix 'Windows Defender Not Recognized' Error in Command Prompt

Fix Windows Activation File Locked by Antivirus

If you see an error like “Windows activation file locked by antivirus” or activation repeatedly f...

Firefox Not Responding? Try Safe Mode Troubleshooting Steps

If Firefox stops responding—freezing, crashing, or refusing to load pages—it's often due to a con...

Fix Windows Defender DNS Error 0x800704cf

You open Windows Defender and see error code 0x800704cf. This usually means Windows Defender can’...

Fix PowerShell Token Expired Error 401

If you're seeing a 401 status code with a message like "token expired" in PowerShell, it usually ...