I seem to remember Oleg/Teodor recently reporting a problem with Windows
hanging on a multi-processor machine, during a heavy load operation.
In their case it seemed like a vacuum would allow it to wake up. They
did commit a patch that did not make it into the last minor version for
lack of testing.
Perhaps you could see if that patch might work for you, which would also
help ease the argument against the patches lack of testing.
-rocco