TechyGeeksHome TechyGeeksHome - Windows, explained properly. An honest assessment of PowerShell DSC in 2026: where it still earns its place, where Ansible or Intune fit better, and what to do with existing configurations. PowerShell Desired State Configuration in 2026: Is It Still Worth It? Andrew Armstrong

TechyGeeksHome TechyGeeksHome - Windows, explained properly. How to size and choose a PC power supply: what the efficiency ratings mean, why protection circuitry matters more than wattage, and the connectors to check for. Power Supplies: How to Choose One and Why Cheap Ones Are a Bad Idea Andrew Armstrong

TechyGeeksHome TechyGeeksHome - Windows, explained properly. Replication problems between domain controllers are often silent for weeks before they cause a visible symptom. A password change that doesn’t propagate, a GPO that applies inconsistently, a user showing up in one site but not another. Checking replication health proactively with repadmin and dcdiag catches these before they become a support ticket. Start with […] How to Set Up and Test Active Directory Replication Health Andrew...

TechyGeeksHome TechyGeeksHome - Windows, explained properly. Diagnose Windows driver problems properly: read the error code, roll back cleanly, stop Windows Update reinstalling a bad driver, and use Driver Verifier safely. Driver Problems on Windows: How to Diagnose and Roll Back Safely Andrew Armstrong

TechyGeeksHome TechyGeeksHome - Windows, explained properly. Running your own internal Certificate Authority sounds intimidating but is genuinely one of the more approachable AD-integrated roles once you understand the two-tier design Microsoft recommends: an offline root CA that almost never touches the network, and one or more online issuing CAs that actually hand out certificates day to day. A two-tier PKI (offline […] Configuring Certificate Services (AD CS) on Windows Server: A...

TechyGeeksHome TechyGeeksHome - Windows, explained properly. A repeatable PowerShell offboarding process: disable, reset, strip groups, move OU and log it — with -WhatIf support so you can prove what it will do. How to Automate AD User Offboarding with PowerShell Andrew Armstrong

TechyGeeksHome TechyGeeksHome - Windows, explained properly. Air cooler or AIO liquid cooler? What each is genuinely better at, why case airflow matters more than either, and how to pick without overspending. PC Cooling Explained: Air vs AIO and What You Actually Need Andrew Armstrong

TechyGeeksHome TechyGeeksHome - Windows, explained properly. Renaming a domain controller is fully supported by Microsoft, but it’s not a simple right-click-rename like a member server. It needs to go through netdom computername so AD, DNS, and Kerberos all stay in sync. Do it the manual way and you’ll end up with orphaned SPNs and broken authentication for anything referencing the old […] How to Rename a Domain Controller Safely Andrew Armstrong