omg..can someone PLEASE help =/

[Silver]

Panda, I have a question.
This is the second time ive reformated my computer due my computer crashing, but it seems that when i load heRO, the game freezes, and my computer freezes up as well. I'm unable to hit alt and F4 or alt, crl, del to close the program. So i'm forced to to hold down the power button to my computer to get the thing to shutdown so i can reboot. But when the Dell logo boots up it has green dotted lines running vertically all over the screen and when it tried to boot it comes up on a blue screen. So..I'm forced to reformat. This has happened TWICE when trying to place heRO. Any idea whats wrong with my computer? or is it the game that is crashing my computer. I have a 256MB NVIDIA GeForce Go 79000 GS video card.