My two systems are affected on lan with this error. There is some error related to bad pool caller. I had tried to run Repair setup but that does not worked out much. The first PC atleast works fine for some hours, but the second one is crashing instantly. My friend suggested me to update the motherboard drivers instantly. I did the same and Vista detected a new hardware. I do not know what was it, but it was related to some card reader. I have a usb hub attached to the system. So the first pc went fine after getting new drivers. But I was not aware that Vista will give Bluescreen for such silly thing. It is a plug and play device.