Spybot says there's a dso exploit in my pc. I don't really know what that is, but i click on fix the problem...it says it's fixed but when I rescan....it's there again...no matter how many times I "fix" that problem. At one point either spyware guard or spyblaster said it was A BHO I decided to keep. I may have done that recovering the dso exploit after my pc experienced a tremendous slowdown in functionality subsequent to opening an email from irfanview users forum. what can I do now?