Andrew Armstrong

Andrew Armstrong is a UK-based IT professional with 26+ years of hands-on experience in Windows, Windows Server, SCCM/ConfigMgr, Intune, Active Directory, PowerShell and enterprise infrastructure. He founded TechyGeeksHome in 2010 and has published 770+ practical guides to real-world IT problems. He also builds free Windows utilities, including Ultimate Settings Panel, which has been downloaded over 850,000 times.

Windows Server

How to Migrate DHCP Between Windows Servers Without Downtime

PowerShell Parameter Validation: Scripts That Fail Safely

SSD vs HDD in 2026: Where Each Still Makes Sense

DNS Scavenging in Active Directory: Configuration and Common Pitfalls

How to Fix Corrupted Windows System Files with SFC and DISM

How to Set Up a Read-Only Domain Controller (RODC)

CUKTECH 20 Power Bank Review: 25000mAh and 140W in a Can-Sized Package

Writing Your First PowerShell Script That Does Something Useful

LingoGeek: translate Word documents, PDFs and subtitles offline, free

ShortGeek 1.0: Turn Your Guides Into Vertical Shorts, Free And Offline

AuthGeek 1.0: A Free Two-Factor Authenticator That Stays On Your Own PC

SoundGeek 1.0: Free Audio Cleanup For Windows, With Nothing Uploaded