Not sure if this counts as a BSOD, but today I opened the Facebook app from the METRO/START screen, the Facebook splash screen appeared like normal, then after a few seconds my screen just went black, the monitor then went on standby mode and then I noticed my computer was rebooting.

I think I've seen apps cause a reboot before on my Windows 8 tablet but never on a desktop. Is this something normal to happen on a Windows 8.1 desktop? The only recent change I made was upgrading my NVIDIA video card driver the other night.