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

Fix Gradle Build: Could Not Find or Load Main Class

When a Gradle build fails with Could not find or load main class, it usually means t...

Fix 'Service Not Found' Error for Task Scheduler on Ubuntu

How to Activate Windows with a Digital License

If you've upgraded to Windows 10 or 11 from a previous version, or bought a new PC with Windows p...

Fix Windows Security Access Denied for Administrator Account

You're logged into Windows with an administrator account, but Windows Security still shows 'Acces...

Checklist to Enable Windows Security Auto Start

If Windows Security (formerly Windows Defender) doesn't start automatically after you log in, you...

Fix Windows Activation slui.exe Not Opening

When you try to activate Windows using the Settings app or a command, slui.exe (Software Licensin...