hp 7800 WIN 7 has a blue screen BAD POOL CALLER 0x000000c2 error and won't boot. I have reseated the memory boards, and reset the IMOS, and removed/reset the battery all to no avail. I cannot find any way to disable the BIO caching/shadowing as suggested. I have tried to rebot with the win 7 disc, but no luck. Anyway suggestions on how to boot, or fix the BIOS?