Thanks for the dumps!
PAGE_FAULT_IN_NONPAGED_AREA (50)
This indicates that invalid system memory has been referenced.
Bug check 0x50 usually occurs after the installation of faulty hardware or in the event of failure of installed hardware (usually related to defective RAM, be it main memory, L2 RAM cache, or video RAM).
Another common cause is the installation of a faulty system service.
Antivirus software can also trigger this error, as can a corrupted NTFS volume.
Code:
2: kd> k
Child-SP RetAddr Call Site
fffff880`03b983c8 fffff800`030f41e4 nt!KeBugCheckEx
fffff880`03b983d0 fffff800`03072fee nt! ?? ::FNODOBFM::`string'+0x42907
fffff880`03b98530 fffff880`061cb2ae nt!KiPageFault+0x16e
fffff880`03b986c0 fffffa80`038c3430 mcaudrv_x64+0x12ae
fffff880`03b986c8 fffffa80`04c8b010 0xfffffa80`038c3430
fffff880`03b986d0 00000000`00002288 0xfffffa80`04c8b010
fffff880`03b986d8 00000000`00000000 0x2288
mcaudrv_x64.sys is the driver that referenced invalid system memory. This is the ManyCam Virtual Microphone driver, uninstall ASAP.
Also, update to Service Pack 1 ASAP:
Learn how to install Windows 7 Service Pack 1 (SP1)
Regards,
Patrick