Hé Catstuff,
These are the things I can think of:
- Check Properties/Security of your MB folders (I assume your login should have 'full control' (apart from 'special permissions'))
- 'White List' all your MB folders in case you use an Anti-Virus program (in Defender: 'exclude' the MB folders)
(Mb folders include: Program Files, Library folder, music folders, App Data (= hidden folder in Users/*Username*/App Data/Roaming)
(if you use the portable version, App Data is included in the Library folder)
As your library database (*.mbl) is saved in your Library folder, maybe best to start there.
Others will correct me if their are better ways.
Good luck!
b.