REGEDIT DISABLED / RUN in Start gone and disabled

I dont really know what happened, but I guess my dad installed some viruses on this computer. I ran all the spyware programs / avg virus and detected / cleaned all the viruses out. The only problem now is that I cannot run regedit because it says that it is disabled by the administrator and the run option that I need is also gone from the start menu and is also disabled from the running when i press the windows key and r. Aso the time box on th taskbar shows ???? marks in the end of the time. I posted a screenshot. Can anyone please help me? thank you.

 

start/all programs/accessories/command prompt.
type in 'regedit', press 'enter'.
This should bring up your editor window...