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

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

Fix Windows Activation Error 0x80070002 (Dependency Conflict)

You try to activate Windows and get error 0x80070002. The message often says something like “depe...

Windows Security Full Scan Stuck at 99% – How to Fix

You run a full scan in Windows Security, it reaches 99%, and then nothing happens for minutes or ...

Fix Command Prompt Token Expired After Login

You log into a system, open Command Prompt, and immediately see an error that your authentication...

How to Fix WinRAR Checksum Error and Configuration Settings

If you see a 'Checksum error' or 'CRC failed' message in WinRAR, the archive is likely damaged or...

How to Fix Outlook Rate Limit Error After Update

After a recent Outlook update, you might see a rate limit error when sending or syncing email. Th...