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

Fix BitLocker Blank Screen on Windows 10 Boot

You enter your BitLocker password at boot, the screen goes blank, and nothing happens. The system...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

If you're dual-booting Windows and Ubuntu, or replacing Windows...

How to Rearm Windows Activation Grace Period

When Windows is not activated, you have a limited time (typically 30 days) before it starts showi...

Fix Windows Terminal Rate Limit Error: Permission Denied

If you see a 'rate limit error' or 'permission denied' message in Windows Terminal, it usually me...

Fix Windows Activation Error 0xc004f074: Permission Denied

You see error 0xc004f074 when trying to activate Windows, often with a message about permission d...

How to Fix 'Outlook File Locked in Use by Another Process'

If you see the message 'Outlook file locked in use by another process' when trying to open Outloo...