Good info here: http://groups.google.com/group/alt.comp.freeware/browse_thread/thread/e8c6ed2a42baf06c
"WhoCrashed reveals the drivers responsible for crashing your computer
Whenever a computer running Windows suddenly reboots without displaying
any notice or blue screen of death, the first thing that is often though
about is a hardware failure. In reality, most crashes are caused by
malfunctioning device drivers and kernel modules.
In case of a kernel error, most computers running Windows do no
