Just to verify/clarify:
This problem just started an hour or so ago?
Previously you were on line with no anti virus protection?
Now your access has been limited on the computer?
System Restore will not restore?
If yes to the above I'd venture an educated guess that you got hit with malware or a virus.
If that is the case I'd suggest posting a HijackThis log in the HijackThis log section of this forum.
If you cannot download HijackThis then do so on another computer then transfer to an external device to run on this machine. Floppy; Thumb drive; SSD card; etc.
HijackThis
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Please read
THIS and after completing the steps outlined post a
HijackThis log over in that section along with a brief description of your problem.
Do not post HijackThis logs in this section please.
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The security / spyware section of D-A-L works a little differently to the rest of the site. We currently only allow Head Security staff to reply to others threads to ensure a high level of support and quality is maintained with the daily issues which require a certain level of knowledge in this area.
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You should get a reply to your log within 24 hours.
Otherwise perhaps another member might have other ideas for you in this thread.