I am having problems with disk thrashing in Win 7 64 bit, which I have tracked to ESS. There will be occasional bursts of disk activity that will freeze my computer for 5-10 seconds. These appear to be due to scanning after updates of virus definitions (which I have now turned off in the scheduler). I also have episodes of disk thrashing, again lasting 5-10 seconds, when I open folders or move files/folders, which I suspect is due to ESS scanning the files/folders. Is anyone having similar problems or having suggestions to tone this problem down? It is very annoying to have the whole computer just hang for 5-10 seconds.