Checklists for software errors, setup, and tool workflows.

Fix Windows Security 404 Not Found on Startup

When Windows Security shows a 404 error on startup, it typically means the app can't find its req...

Windows Activation for Ubuntu Installation Guide

You installed Ubuntu alongside Windows and now Windows shows it's not activated. This is a known ...

OneDrive Sync Ubuntu: Setup Checklist for New Users

Before You Start

OneDrive doesn't have an official Linux client. Ubuntu users rely on the...

Windows Defender Proxy Error: Setup Checklist for Fix

You're running Windows Defender and it throws a proxy error—often during an update or a full scan...

Fix OneDrive 502 Bad Gateway Permission Denied Error

If you see a 502 Bad Gateway or Permission Denied error when us...

Fix Windows Defender Blocking Legitimate Software

You install a legitimate application, and Windows Defender immediately blocks it or deletes its f...