It seems the memory.dmp is corrupted... this is possible when it hasn't been saved properly, but that isn't the fault of the user.
See if you can update the chipset drivers, else you might need to replace the Razer USB devices temporary for testing.
Razer devices are fairly known for causing problems.
6: kd> lmvm usbfilter
Browse full module list
start end module name
fffff801`f6b00000 fffff801`f6b11000 usbfilter T (no symbols)
Loaded symbol image file: usbfilter.sys
Image path: \SystemRoot\system32\DRIVERS\usbfilter.sys
Image name: usbfilter.sys
Browse all global symbols functions data
Timestamp: Wed Aug 29 03:27:12 2012 (503D6FF0)
Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4