@SomeoneWeird: Eventually, running Ubuntu as my main OS and Windows in a VM is my goal, but it creates too many headaches at once. For example, I really like my VPN WiTopia, but it doesn't have a Linux version. Another example: my mobile broadband card technically will work with Linux, but it involves two pages of tedious instructions.
So, I am slowly phasing Windows out and Ubuntu in. For example, I now do all of my web surfing in Ubuntu running in a VMware VM.
@1MLyg5WVFSMifFjkrZiyGW2nw: I am running Windows 7 and I am trying to restrict any possible malware from installing and/or running itself without entering the Admin password.
Just install bitcoin in the VM then?
And as 1MLyg5WVFSMifFjkrZiyGW2nw said, look at the group policies and change everything to restrict what the other account can do