I just had two BSOD today after a clean install of Windows 8 using the 10.8.3 Bootcamp Assistant. The only thing I did post install was update the Nvidia drivers to 314.22. I went to bed with Steam downloading some games and woke up to a crashed machine. It crashed a second time while trying to upload the error report to microsoft after a reboot. I've put together the following bug report using WhoCrashed.
I've removed the Nvidia HD Audio Driver for now and am considering rolling back to the stock version of the Bootcamp drivers for stability.
Can you post a link to the Nvidia bug report you filed?
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On Tue 3/26/2013 8:26:38 AM GMT your computer crashed
crash dump file: C:\Windows\Minidump\032613-150421-01.dmp
This was probably caused by the following module: nvhda64v.sys (nvhda64v+0x760C)
Bugcheck code: 0x1000007E (0xFFFFFFFFC0000005, 0xCAF020C8, 0xFFFFF88009376828, 0xFFFFF88009376060)
Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M
file path: C:\Windows\system32\drivers\nvhda64v.sys
product: NVIDIA HDMI Audio Driver
company: NVIDIA Corporation
description: NVIDIA HDMI Audio Driver
Bug check description: This indicates that a system thread generated an exception which the error handler did not catch.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: nvhda64v.sys (NVIDIA HDMI Audio Driver, NVIDIA Corporation).
Google query: NVIDIA Corporation SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M