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

How to Fix Command Prompt DNS Errors in Windows 10

When you see a DNS error in Command Prompt—like “DNS request timed out” or “could not find host”—...

Fix Windows Security Connection Refused Service Not Running

If you see 'Connection refused' or 'Service not running' when opening Windows Security, the under...

Fix Windows Update Authentication Failed for Domain Users

If you're a domain user and see "Authentication failed" when checking for Windows Updates, the is...

How to Set Up Windows Update for an Ubuntu Virtual Machine

If you run a Windows virtual machine (VM) on an Ubuntu host, you might notice that Windows Update...

Fix Windows Defender DNS Error Permission Denied

You run a scan or update in Windows Defender and see an error like "DNS error permission denied" ...

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" ...