When playing games via steam I occasionally get a crash followed by the error message. failed to lock vertex buffer in cmesh dx8 According to the FAQ on steam this is caused by a lack of paged pool memory which is reserved for apps like direct3d. To get round this issue its recommended that you remove a line form the boot.ini which unlocks the page pool memory. The line is /3GB /Userva=2900 Does anyone know where this line is in windows 7 or how I can unlock the paged pool memory as I'm finding the crashes are starting to interfere with my enjoyment of gaming. Any help gratefully appreciated.