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

How to Fix Windows Security High Memory Usage

You open Task Manager and see Windows Security (or Antimalware Service Executable) using 500 MB o...

Fix Outlook High CPU Usage Caused by Antivirus Scanning

Symptoms and Likely Cause

You notice Outlook consuming 50% or more CPU, making your syste...

Fix 7-Zip 'Cannot Open File' Error When Repairing Archives

When you try to repair a corrupted archive with 7-Zip and get a “Cannot open file” error, it usua...

Fix Windows Activation Service Unavailable Without Product Key

You see 'Windows activation service unavailable' and you don't have the product key. This usually...

Windows Update 404 Not Found: Practical Checklist

When Windows Update gives you a 404 Not Found error, it usually means the update files are missin...

How to Fix Command Prompt Rate Limit Error Not Working

When you encounter a rate limit error in Command Prompt and the usual fixes don't work, commands ...