I have experience hdd hanging in the midst of operations, this situation presents itself in a multitude of ways. Firstly, it would hang if i were to use graphics intensive applications adobe photoshop/illustrator, autodesk autocad '08 etc. Secondly using wmp 11 with a combination of msn messanger. Thirdly, using firefox to browse WWW.NBA.COM All of the above would cause the HDD LED indicator to stop blinking, this problem has been a thorn in the flesh for a couple of months, and i have run a series of test ranging of memtest 86 to hdd diagnostics test. Yet all results return normal, i can't lay a finger to it what is exactly wrong. I have changed a new hdd, yet this problem still persists may i know what should i do?