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

Fix Slow Command Execution in Command Prompt

If you notice that commands in Command Prompt (cmd.exe) take several seconds to execute, even sim...

Fix 'Putty Connection Refused' Error on Localhost

When you try to connect to localhost with Putty and get 'connection refused', it usually means th...

PowerShell Version Mismatch: A Sysadmin Checklist

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

Fix Windows Security Certificate Error in Outlook 365

You open Outlook 365 and see a security certificate warning: "There is a problem with the proxy s...

Fix Windows Activation Authentication Failed After Hardware Change

After upgrading your PC's motherboard, CPU, or other major hardware, Windows may display an activ...

GOPROXY Environment Variable Configuration Guide