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

How to Fix Windows Security 404 Not Found Error

If you see a '404 Not Found' error when opening Windows Security (formerly Windows Defender), the...

Remote Desktop Troubleshooting Checklist for Admins

When users can't connect to a remote desktop, the root cause is often something simple. This chec...

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 DNS Server Not Responding in Windows Search

When you search for network printers, shared folders, or other devices from the Windows Search ba...

Windows Activation Module Not Found After Update: Fix

After a recent Windows update, you may see an error that the activation module is missing or not ...

Windows Defender Cannot Connect: Troubleshooting Checklist

You open Windows Security and see a message like "Windows Defender cannot connect" or "Check your...