I have a very repeatable BAD_POOL_HEADER (19) BSOD on a Lenovo ThinkPad W520, Win7 64-bit, that I can avoid by disconnecting my network cable and starting the PC. It only occurs if the network cable is connected, the wireless LAN connection has no affect on the occurance of the BSOD. I have updated all of my hardware drivers that I can find and am still recieving the BSOD. I have tried to locate the offending driver with WinDbg but am not very knowledgable about this tool and am not sure how to identify the driver that causes the BSOD. If anyone can help me to identify the dirver it would greatly appreciated.