computer freezes after 8-10 minutes, BSOD follows

Hi I have a fairly new computer (14 months) that never gave me any problems until recently. My computer will 100% freeze after roughly 10 mins of use (doesnt matter what i do in the 10 mins). I'm running windows 7 home 32 bit, i5 quad core (cant rmb alot of details, will dig up more soon), asus p8p67 mobo, wd 1tb green and 4gb ram.

The only way to "unfreeze" my computer is to restart it, if i leave it as it is without restarting I'll get a BSOD that says "KERNEL INPAGE DATA ERROR"

error code: STOP: 0x000000F4 (0x00000003, 0xA16DE4E0, 0xA16DE64C, 0xE3060200)

any help would be much appreciated, thanks.

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