Tech problem

[baerry]

Hello, me and my friend we both bought this game, but i got a problem whit mine, when i play sp or mp my game freezes when i try to loot corpses or boxes,i it even freezes when i try to change stuff in options. but it only freezes for about 5-15sec everytime, but thats annoying for the rest playing when we do coop. it runs smooth aslong as i dont loot any.

my sys-specc:
core2duo 2.8ghz,
Geforce 8800gtx,
2gm ram, 800mhz,
1tb hd, 600gb free,