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

How to Fix Windows Defender File Locked Error 0x80070020

Error 0x80070020 often appears when Windows Defender (Microsoft Defender Antivirus) is scanning a...

PowerShell DNS Server Troubleshooting Checklist

When DNS resolution fails or a server stops responding, PowerShell provides direct cmdlets to dia...

Clear Windows Update Cache to Fix Slow Performance

If your Windows PC feels sluggish, especially after recent updates, corrupted update cache files ...

How to Fix SSL Protocol Error in Chrome: Connection Refused

When you see “SSL protocol error” and “connection refused” in Chrome, it means the browser can’t ...

Certbot Renewal Failed Due to Nginx Configuration: How to Fix

Fix Windows Search High CPU Usage (SearchIndexer.exe)

If you notice your PC slowing down and Task Manager shows SearchIndexer.exe using 50% or more CPU...