rikvm_1628BCEA.sys

Unknown driver from this topic: http://www.techsupportforum.com/forums/f299/bsods-573681.html may be associated with a dynamic driver from this product: http://en.sourceforge.jp/projects/sfnet_mxt/downloads/mxt/mxt-2.4.5/mxt-2.4.5-pre5-rikvm-7/
Maybe associated with Cyberlink Power DVD (from this link: http://www.bleepingcomputer.com/forums/topic411981.html )