I think I may have a virus. Macafee is not scanning or being updated and when I try to force an update or a scan it will not load. Also Malwarebytes does not scan properly, just grinds to a halt. Is there an on-line scanner I can use? I had a similar issue a couple of months ago which I (thought I had) resolved by wiping the system and upgrading to 64-bit Windows 7. Now it is back to the same issue. I'd like to try and avoid re-installing Windows again if possible, major PIA and I need my computer to do my taxes this week! I have been using PC Healthboost and CCleaner to maintain my PC, but I've heard these can cause issues, is that possible?