Already filed a bug, But this bug brought Vista to it's hung up knees.
I was doing a NIC Hardware dianogstic test and it got down to the loopback test and that part of the test crashed the wloc MSFWSVC causing Vista to stop dead
The NIC Network Interface Card (Network Adaptor) Intel Pro/100 with Proset tools 12.0.xxx and driver 8.0.43.0