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

Fix Windows Security High Memory Usage

If you notice that Windows Security (formerly Windows Defender) is using a lot of memory—sometime...

Outlook DNS Error Checklist – Common Causes & Fixes

When Outlook can't connect to your mail server and shows a DNS error, it usually means the app ca...

Jupyter Kernel Connection Error: Causes and Fixes

You start a Jupyter notebook, try to run a cell, and see a message like "Kernel error" or "Connec...

Fix Windows Update Error Due to Port 80 Already in Use

Windows Update may fail with error 0x8024402c or similar when another application is already usin...

Fix BitLocker Error 0x80310017: Authentication Failed

When you see the error "BitLocker authentication failed" with code 0x80310017 during startup, it ...

Certbot Renewal Failed Due to Nginx Configuration: How to Fix