last christmas i bought a mobo bundle from savastore.co.uk a 2100+, 256mb ram 333mhz, and a kt-4 ultra. i put it in a case (dunno witch) with a western digital 40gb 7200rpm hdd a cdrw and a dvd and a geforce4mx 440 (this is my first pc i've built so don't mind the strange things i do) ever since i've built it, it has crashed. . even on defaults. i change the virtual memory in windows to 4gb, thinking it would give me a performence boost but it worked for a while then it started to crash al the time. but i checkt it with a friend and put it to the same as his and it hasn't crashed but when i but the fsb to 133mhz it crashes after a while(windows or the game just freezes and the only way to get it working again is to reset) so i now have to put my fsb on 100mhz (1500+) and then it doesnt crash. my system temp.is 35 C idle and 39C gaming but my cpu temp @ 50C when idle and 54C gaming, so i dont think thats the problem. i'm thinking of ugrading my system this summer so i would like to know what i could do about it. athor whiles i will have to get a new motherboard and wont be able to upgrade my system.