The attached DMP files are of the 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.
2: kd> k
Child-SP RetAddr Call Site
ffffd000`30946618 fffff802`f6c0524a nt!KeBugCheckEx
ffffd000`30946620 fffff802`f6ae79c9 nt! ?? ::FNODOBFM::`string'+0x20d9a
ffffd000`309466c0 fffff802`f6bde22f nt!MmAccessFault+0x7a9
ffffd000`30946800 fffff800`36f67bd8 nt!KiPageFault+0x12f
ffffd000`30946990 00000000`00008401 rtwlanu+0xdcbd8
ffffd000`30946998 00000000`00000000 0x8401
is the Realtek RTLxxxxx Wireless USB 2.0 Adapter driver.
Ensure the network driver is up to date.
2. Remove and replace avast! with Windows 8's built-in Windows Defender for temporary troubleshooting purposes as it's likely causing NETBIOS conflicts:
avast! removal - avast! Uninstall Utility | Download aswClear for avast! Removal
Windows Defender (how to turn on after removal) - Windows Defender - Turn On or Off in Windows 8