The StartMenuExperienceHost.exe process crashed.

There is a lengthy thread on Microsoft's forums about StartMenuExperienceHost.exe crashing.  Some of the users also indicated they weren't even using the start menu at the time.  Many are pointing their finger at a recent Windows update as the culprit.  The MS rep suggested uninstalling the update and/or doing a repair to fix it.

Here is the thread:  StartMenuExperienceHost.exe Fails - App Error - Microsoft Community