> she is a standard user
First, good for you. Running as a standard user is an excellent thing to do, and it probably saved your system.
> I can log into my account (my account on that machine is an administrator) and it works fine
> she cannot use anything in her profile
The nuclear option is to delete and recreate her profile. Is there data she wants to save? It may be easier to log into your account, copy everything she wants to save, delete her profile, and recreate it (putting the stuff she wanted to save back) then to try to repair all the damage caused by the virus.