I have SAS Pro, for a couple days my computer kept crashing, ran several full scans with out finding this. Did hard drive, memory checks, checked windows, and finally ran a quick scan with Microsoft Security Essentials, and it found this ( Trojan:Win32/Powessere.A!reg ) . I had MSE remove it, but from what I have read, this thing can hide on your computer. What do I need to do, and why didn't SAS find it in the multiple scans I ran?