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

Fix Windows Defender DNS Error 0x800704cf

You open Windows Defender and see error code 0x800704cf. This usually means Windows Defender can’...

How to Install SSL Certificate on Windows Server 2019

You have an SSL certificate file (usually .pfx or .cer) and need to install it on Windows Server ...

Outlook Proxy Error Checklist: Fix Connection Issues

When Outlook throws a proxy error, you typically see messages like "Cannot connect to your mail s...

Fix Windows Terminal Proxy Not Working: Practical Steps

If your Windows Terminal isn't routing traffic through your system proxy, you're likely seeing co...

How to Reinstall Windows Defender After Error 404

If you see a 404 error when trying to open Windows Defender, it usually means the app's files are...

How to Fix Outlook Rate Limit Error in Office 365

Understanding the Error

You may see a message like "Too many requests" or "Server busy" ...