My computer has been heavily burdened with trojans since my Mcafee subscription expired. It was a bad AV program anyway. Now, I bought a PcCillin 2005 CD; I could not install it. I have since then decided to try NOD32 and Kaspersky to see which is best, so I downloaded the NOD32 trial version. However, I get an error (106) about unpacking. These trojans seem to be determined ones. Can you help me out here?