My problem is i keep getting "The instruction at "0x000000000" referenced memory at "0x00000000". The memory could not be "read". Click OK to terminate program." when i use itunes and sometimes mozilla. ive been away for the past 2 weeks, so my computer has been unplugged from the wall. i came home yesterday and turned it on and started itunes, and it worked for a bit before that error message came up and the progam shut down. while i was using firefox, the same type of error occured and i had to close it. i put up with it just for yesterday. this morning when i came to boot my computer, it took ages. like it went through start up image thing, then screen went black for a bit before the computer restarting itself and then it worked like normal again. i have had this problem before after going way for 4 weeks. but last time my ram was faulty and i got a new stick from the warranty. my old ram was dual channel, and the replaced one is only single, if that matters. Any ideas on what i can do?