@Renvales
Download this put, and put it on a floppy, then restart your computer and boot from the disk. It will test your memory.
http://www.memtest.org/download/1.65...st86+-1.65.zip
@Unibob
I consider norton a virus. I would also recommand if possible to make second user account just for ffxi and you can turn off the backround stuff, that you normal would have running when using the computer. That way you don't have to keep turning programs on and off. You just switch accounts.