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

Check Which Process Locked a File Using PowerShell

When you try to delete, move, or rename a file and get an error like "File in use" or "Access den...

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

How to Refresh Windows Security Token

When Windows authentication fails—you can't access a network share, get access denied errors, or ...

Microsoft Teams Migration Missing Data: Troubleshooting Guide

After migrating Microsoft Teams, some content like messages, files, or channel structure may be m...

How to Fix Outlook 504 Gateway Timeout Error

If you're seeing a 504 Gateway Timeout error in Outlook, it usually means the server didn't respo...

Fix Remote Desktop Certificate Error 0x80090322

When connecting to a remote desktop, you might see error 0x80090322. This usually appears as a me...