I'm running a virus/addware/etc. scan on my Macbook, with Norton (yes I know some of you hate Norton but thats what I got back in the day so its what I'm using) and the scan keeps stopping about half an inch from completion and just sitting there. The computers fans start to run like its working too hard or something and it will not go any further. It has stopped with around 49946 files left three times in a row now. What's going on? I have tried to delete the file it keeps stopping on then it just stops in the next in line. PLEASE HELP I just got Leopard and don't want to install until I know my system is ok. on a side note what Anti-Virus is best for Macs?