If it doesn't really matter, I would say go for the webcam drivers first. How often does it happen... I know its sporatic, but usually when I have failures I can say that they will happen every 2-3 days... so you have some idea of how long to run with the new config before ensuring that's the problem.. If it happens every 2-3 days, I would say run 4 days, if no error, reinstall it, and try for 4 more days... if you fail, there's your problem...
