Removing sniffer just means you are running without any safety. That is not a solution, just a step in diagnosing the actual problem (the video card driver). The cause is a bug in the Nvidia video card driver that you updated recently. Contact Nvidia and see if they have an updated driver that fixes the bug, or if you need to roll back to an older driver that doesn't contain the bug. Remember: a BSOD, system shutdown, system reboot, or whole system freeze cannot be caused by applications. Those behaviors can only be caused by bugs in the OS, bugs in low level drivers, or defective hardware.
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