if you mean System restore date, no, I think you should clean your system and patch it, that should be easier and less of a risk. (I am totaly assuming you're computer has been infected by the msblast.exe) Although you may want to get some more opinions on the matter before deciding what to do.
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It takes 43 muscles to frown and 17 to smile, but it doesn't take any to sit there with a dumb look on your face.
I have fun. Usualy at my own expense, but I have fun regardless