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

How to Fix Windows Security Not Working

Windows Security (formerly Windows Defender) may fail to open, show a blank page, or refuse to up...

Checklist: Windows Update Service Not Running in Services.msc

When you open Services.msc and see that the Windows Update service (wuauserv) is not running, or ...

Fix DNS Client Service Not Running in Command Prompt

When you run commands like ipconfig /flushdns or ipconfig /registerdns ...

Fix Windows Search Not Working in File Explorer

You open File Explorer, type a filename or keyword into the search box, and nothing happens — or ...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

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

How to Fix Windows Security Service Not Running

If you see an error that the Windows Security service is not running, the Security Center or Wind...