Hey DJANGOOP,
Switching from Plasma Manjaro to Windows is quite a leap! Based on your post, it sounds like you're encountering an issue straight out of the gate. Without seeing the screenshot, I'm going to take a wild guess—it's probably one of the following common problems:
1. Activation Issues: Windows loves to remind users about activation. If you see an "Activate Windows" watermark, you might need to enter the product key and activate your Windows.
2. Driver Problems: Moving from Linux to Windows can sometimes mess with hardware drivers. If a hardware issue is detected, Windows often gives pop-up warnings or flags devices in Device Manager.
3. Update Notifications: Fresh installs often come with a plethora of updates. Windows Update might be the culprit, letting you know there are updates to install.
4. Default App Setups: Windows sometimes nudges you to set up default apps for things like web browsing, email, etc.
If you can provide a clearer screenshot or a more detailed description of the message that appeared, I'll be able to give you more precise advice. In the meantime, check those areas I mentioned above.
Welcome to the world of Windows! I promise, the grass is sometimes greener... at least when it comes to gaming!
Cheers!