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

Fix Windows Activation Error After Clean Boot

You've performed a clean boot to troubleshoot a problem, and now Windows reports an activation er...

Reduce Command Prompt Memory Usage: Practical Steps

If you notice the Command Prompt (cmd.exe) consuming more memory than expected—sometimes hundreds...

Fix Windows Defender Invalid Configuration Error 0x800705b4

When you see error 0x800705b4 in Windows Defender, it usually appears during an update or scan at...

Fix PowerShell Version Mismatch in Remote Commands

When you run remote commands via PowerShell remoting (Invoke-Command, Enter-PSSession), you may s...

Fix Putty Connection Refused on Port 22

You try to connect to a remote server with Putty on port 22, but you get 'Connection refused'. Th...

BitLocker Recovery Key Not Accepted: Fix Authentication Failed Error