0x50: PAGE_FAULT_IN_NONPAGED_AREA
Requested data was not in memory. An invalid system memory address was referenced. Defective memory (including main memory, L2 RAM cache, video RAM) or incompatible software (including remote control and antivirus software) might cause this Stop message, as may other hardware problems (e.g., incorrect SCSI termination or a flawed PCI card).
As your debug log noted the faulting driver could not be identified. So,,,
1. Run MemTest on your RAM
2. Read the sticky in these forums posted by Julio on what to do before posting minidumps
3. Run ChkDsk