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

How to Free Up a Port in Command Prompt (Windows)

When an application fails to start because a port is already in use, you need to free that port. ...

PowerShell Version Mismatch: A Sysadmin Checklist

You run a script that worked yesterday, and today it throws errors about missing cmdlets, incompa...

Chrome Profile Configuration for Multiple Users Guide

When multiple people share a computer, or you need to keep work and personal browsing separate, C...

How to Reinstall Windows Defender in Windows 10

Windows Defender (now called Microsoft Defender Antivirus) is built into Windows 10 and typically...

Fix PowerShell Remote Connection Refused Error

Fix Windows Activation Invalid Configuration After Hardware Change

After replacing a motherboard, CPU, or hard drive, you might see "Windows isn't activated" or "In...