What is direct3d acceleration, and why does my com say i dont have it?

Darkithanime

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Oct 19, 2011
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YO! i have a sony Vaio Vgn-NS325J that "had" windows vista 64bit on it.

(my com used to be able to play high graphic games like crysis, and devil may cry 4)

i upgraded to windows 764bit, and a few days after that i got i got messages saying the Direct3D acceleration wasn't working (or was turned off)

(now i can only play old games like diablo and starcraft)

i tried updating the drivers... that didnt work

i tried updating directx... that also didnt work

when i check the Dxdiag at first it says that the Direct3D acceleration is off, but when i run the 64bit Dxdiag it says its turned on
 

Darkithanime

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Oct 19, 2011
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i did not format the drive at the time... was i supposed to o_O?

and one other thing (i dont think ive ever got a straight answer for this) can you only use windows installer cds only once, or can you use it multiple times because you own it?