Hi... I built my own computer not too long ago.. i installed everything correctly (at least i think i did) and it was working perfectly but now and then computer just freezes up... the computer seems to be still on but i cant do anything until I manually switch comp on and off... I really cant explain this any other way... there is no blue screen or error screen to tell me whats wrong... it just... freezes... I am really frustrated and worried that something is horribly wrong... if someone could tell me what i have to do to fix it... thanks