I am having a reoccuring issue where my machine freezes. No blue screen or any message, it just locks up and requires a manual restart. My event Viewer simply gives me the message "The previous system shutdown at 9:17:11 PM on 5/13/2013 was unexpected."
I'm not sure what my next step in debugging should be. This machine is fairly new, was built in January and has been doing this infrequently since late February. Sometimes it will happen three times in one night and sometimes it goes two weeks without an issue.