This problem is related to the user being repeated if you are using Virtual Machines.
Create another Administrator user on Windows 7, log out of the current troublesome user and log into the new user and it should work.
Review this:
https://www.youtube.com/watch?v=UgygcCWfm_s
p.s. The username should be unique and NOT used before in other machines on the same computer.
Good luck.