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

Fix Windows Defender File Locked During Scan

You run a Windows Defender scan and it reports that a file is locked and can't be scanned. This i...

Windows Security Dependency Conflict Troubleshooting Checklist

Windows Security can fail to start or update properly when a dependency—like a service, driver, o...

BitLocker Recovery Key Prompt After Windows Update: Fix Guide

You update Windows, restart your PC, and instead of your normal login, you see a blue screen aski...

Fix Cloudflare Error 521 on Apache Server

Cloudflare error 521 means your web server (Apache) is refusing the connection from Cloudflare's ...

Fix Windows Search Login Loop Error 0x80070520

When you see error 0x80070520 in Windows Search, it usually means the search indexer cannot authe...

How to Fix Remote Desktop 'Connection Refused' or 'Permission Denied'