I have Core 2 Duo E7500 @ 2.93 Ghz, 3 GB DDR2 Ram, 500 GB HDD and Installed creative sound blaster 5.1 card. My system hard disk each drives are 65 - 70% have data's. Recently some days my system hanging sometimes.. I have checked my HDD with seatools it passed & Chkdsk also. I would change new Ram to 2+2 GB. But still i would face this problem... Can u anybody tell sollution for me..