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

Fix Windows Security 504 Gateway Timeout During Windows Update

If you see a "504 Gateway Timeout" error in Windows Security while trying to run Windows Update, ...

How to Fix SSH Permission Denied (Publickey) on Git Push

You try to push a commit and see: Permission denied (publickey). The push fails. Thi...

Command Prompt Connection Error Troubleshooting Guide

Fix PowerShell 502 Bad Gateway After Windows Update

After a recent Windows update, you may encounter a 502 Bad Gateway error when using PowerShell to...

How to Fix DNS Probe Finished NXDOMAIN on Chrome (IPv4/IPv6)

You're browsing in Chrome and suddenly see "DNS probe finished NXDOMAIN" — meaning the domain nam...

How to Enable Automatic Windows Update Startup

If Windows Update doesn't start automatically, you may miss critical updates. This guide shows ho...