I thought I'd give the new v3 AV a go so installed the 64-bit version of RC1 on my XP Pro x64 system. After rebooting, I started a full scan which got to about 42% before stalling. CPU usage was 100% for the NOD service. I cancelled the scan which worked and CPU went down to 0%. Not sure what happened, but gone back to my usual AV for now. BTW, the alert window is not resizable and does not show tooltips, which means that if the objects path is long, you cannot see what the object is. GUI is much better compared to v2.7, but product still appears a little rough around the edges. Maybe these edges have been smoothed in the final release though.