Before the explosives, there is the recovery cd or wizard that came with your PC; but that leaves you with a "like new" pc that you have to reload everything. Of course you have to save everything first. But if you have a virus (I call it that because it keeps spreading in your registry, like a virus) then that may be the way to go. I think these guys know more than I do, but I spent about a year, one week, trying to delete adware that Norton would identify, but the next time I started up, it was there again. Sometimes under the same names, sometimes under different names. Sometimes 3 or 4, sometimes 10-15. I hope that is not the situation you are in, but before you blow it up, recover it.