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

Fix Remote Desktop Black Screen After Connection

You connect to a remote PC via Remote Desktop (RDP) and see only a black screen. The cursor moves...

Fix Task Scheduler 'Access Denied' When Running as Admin

You set a Task Scheduler task to run with highest privileges (administrator), but it fails with a...

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" ...

Enable Windows Defender via Group Policy: Step-by-Step Guide

If Windows Defender is disabled on your system—perhaps after installing third-party antivirus or ...

Fix Windows Update High Memory Usage When Not Working

You open Task Manager and see Windows Update using 50% or more of your RAM, while updates are stu...

How to Fix Windows Defender Version Mismatch on Windows 10

You might see an error saying Windows Defender has a version mismatch, or the app won't open beca...