The manually created dump file did not show anything unusual.
Cab you try a "clean boot" and see if the same issue exists:
https://support.microsoft.com/en-us/kb/929135
If a clean boot does resolve the issue there is a section in the article "How to determine what is causing the problem by performing a clean boot".
Reset the computer to start normally afterward.
As a general precaution create a System Restore Point prior to initiating a clean boot.