I would say being your crashes are about 30 days apart your not in all that bad of shape.
But this last one here below.
File Description : NVIDIA Windows Kernel Mode Driver, Version 187.80
Is possibly a video driver that did a no-no and cause an error.
If you get regular occurrences of this same error and this is related to your video card, it could be a problem.
Have you left this machine off for the last 20 or so days and just booted it recently to get this error?
Or have you been using this computer regularly and these are the only instances that have happened, then you for the time being do not have much to worry about.
Occasional system crashes do happen even in the best of systems.