help!!!!!!!!!!!!!!!!!! just had a system built for me...nothing fancy...as rock socket a motherboard semperon 2800 etc etc... 80 gig hd 512 ram my trouble started 3 days ago when i upgraded ram to 1 gig when i done this a message stating(to many hardware changes ..pls reinstall xp) popped up...i thought this was fair enough as i had also installed a fancy soundcard...so i installed xp agin...and deleted the partition and started afresh...after installing all of my programes again the sytem became unstable and kept going (blue!!!!!!) so time after time ...i reinstalled windows!!!! six hours later ...i realised the problem on windows was to do with the fact there was a hardware problem...checking the hardware list i discovered the vga driver from the motherboards graphics card had been erased ..two hours later i got the drivers and installed them ....now the system works ....but when you boot the computer ...after windows xp profesh pops up, the screen goes black and the fan starts up ...the screen remains black for 3 minutes ..then the fan stops and the screen goes on to log in user screen i have just bought today a 64mb radeon graphics card and installed the drivers for this as well ... and i still have the same problem... i have spent 18 hours this weekend trying to fix it...i have tried different display modes as well what am i doing wrong ...is it something to do with the power settings in bios????????? is it to much ram??????????? corrupted hard disc...broken monitor ?????? help me please!!!!!!!!!!!