Other than the windows "rights" issues, i cannot begin to think what may cause the problem.
Rights management programs dont come as spyware (thank heavens as that would cause absolute havoc on a computer).
The only other thing that i may suggest is re-installing the game, but this time dont use the default folder. Change it to a folder like c:\games\larian\beyond divinity\ where windows wont try and have a say over who can use it or not (in other words not a protected location like c:\windows or c: program files or c:\documents and settings
Just for interest sake, if you go into control panel, and then go into users, you will be able to see if you are an "administrator" or a "limited user"
