I recently installed Norton to scan for virus' b/c i was constantly getting messages on my cpu saying that there was not enough free memory to run exploer, etc. In addition to that, explorer shuts down periodically. I don't really know what to do, all I did was scan the files and it came up with 1 infection, which i deleted. Then I downloaded the "shredder" zip file to assist the system. What would the main problem be explorer shutting down and how can i try and fix it??? my first post!