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

Fix Windows Security High Memory Usage

If you notice Windows Security (formerly Windows Defender) using excessive memory—sometimes hundr...

Fix Windows Defender Service Not Starting (Error 404)

If you see error 404 when trying to start Windows Defender, it usually means the service executab...

How to Fix Chrome Extension Sync Issues

You open Chrome on another computer, expecting your extensions to appear—but they don't. Extensio...

Fix Chrome Profile Corruption on Ubuntu

If Chrome on Ubuntu starts crashing, showing blank pages, or refusing to open with a message like...

How to Fix Windows Update Configuration Error 0x800f0922

When you see 0x800f0922 during a Windows update, the process usually stops with ...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

If you're dual-booting Windows and Ubuntu, or replacing Windows...