After installing Music Maker 2026 Premium and running it, I find it responds very slowly to menu opening or anything on my brand-new laptop running Windows 11 Pro, although it runs fine on my desktop computer.
You are logging into the computer using a Microsoft Account and OneDrive is activley transferring your documents folder into the 'Cloud'.
If so as a minimum you need to stop OneDrive from uploading the Magix folder in your Documents folder, see this article on how to do this. Ensure you have a backup copy of everything that has been uploaded to OneDrive.
If you do not need to use OneDrive then see this article to disable/uninstall completely.
Ensure you have a backup copy of everything that has been uploaded to OneDrive before doing either of the above..
If you are logging in to the computer with a Local Account
Check the Windows settings, Accessibility, Text Cursor, Text Cursor Indicator option is turned off.