It sounds like some restricitons have been placed in the Registry, let's see what else this reveals...
Download
combofix.exe-Save it to your Desktop, we will need this later.
Double click combofix.exe & follow the prompts. When finished, it shall produce a log for you. Post that log in your next reply
Note:
Do not mouseclick combofix's window whilst it's running. That may cause it to stall