ok 2 months ago i bought a new memory for my computer from 256mb i added 512 so that makes it 768mb at first the computer doesnt read the added memory but after a few restarts it was able to read it..for a couple of weeks the computer was OK until yesterday when i was browsing the net my computer just restarted and it just restarted when its about to show the xp loading screen. it would then sometimes show a blue screen of death instead so assumed the computer might be hot.. so i turned it off for an hour when i turned it back again i noticed that the memory testing is in random its sometimes 256mb and sometimes 512mb and it loads quite fine but when the memory test sometimes is about 768mb it restarts..i dont know why it is causing this a friend of mine told me that maybe the cmos battery is about to die..i dont know cuase i just formated my pc...any help on this?