I found a solution to a BSOD xp2 problem I have always had on my laptop. After I installed sp2 on my laptop (an Inspiron 8600) it would blue screen on every boot with BAD_POOL_HEADER. The problem seemed isolated to the 8600 when my boss, who had the same laptop as myself, tried to install sp2 and it also blue screened. Installing a new bios, disabling every piece of hardware I could think of (NIC, video, bluetooth, you name it!), and absolutely no startup options didn’t seem to help. It would, however, boot into safe mode.
So, after many months of installing and uninstalling sp2, I finally found the problem. The TAPI drivers for the NBX phone system (ver 4.0). These drivers are needed for a TAPI softphone as well as a WAV driver. After uninstalling the TAPI drivers, everything is working smoothly.