The REFERENCE_BY_POINTER stop error did not show a third party driver caused the crash.
However the process that crashed was the "RapportService", a component of Trusteer Rapport.
I woud suggest to uninstall, at least temporarily. the Trusteer Rapport software and see if the situation improves.
Also, from the Event Viewer, there appeared to be an NTFS_FILE_SYSTEM stop error on July 29.
So consider running a chkdsk /r on the hard disk.
To run a chkdsk /r follow Steps 1 to 10 in the following link:
http://www.vistax64.com/tutorials/67612-check-disk-chkdsk.html
Running a chkdsk /r has the potential to take a long time and, as a general precaution, backup any critical files beforehand.