Windows 7 VM will behave the same as any other windows 7 machine
Your user log in user should have admin rights
To change things like in system32, for example, I renamed taskmgr.exe, and moved it so only I can run it.
First you need to change ownership of the file, then you can change other properties. (I did that I can run something and don't want the scammer to be able to close it via task manager)
If you change a lot of things, the scammer will realize quickly your screwing with him, so I have different snapshots depending on what I'm trying to do, from super troll, to super stealth.