BSOD Ntoskrnl.exe: When Browsing Folders Networked Through Ethernet PC-to-PC?

I am consistently getting a BSOD on my new system build (Win7x64SP1.) It happens only when I browse my network folders while connected to my other desktop (Win7x86SP1) though ethernet (no router.) In this configuration both computers have their own wifi adapters for Internet connectivity to the apartment building's router. I have also tried sharing the Internet connection with one and the same thing happens. Browsing either mapped drives or network shares produces the same result. I detached all other external hardware to test as well.The minidump refers to ntoskrnl.exe It doesn't happen right away. Sometimes it's within 5 minutes, sometimes after an hour or two. I get no other BSODs at all.If I network the two computers over a wifi adhoc, or through the landlord's router no BSOD happens. I can browse my home netowork, public network, mapped drives, whatever. It also does not happen when the ethernet NIC is connected to the router. I don't want to network through the loandlord's router for obvious reasons. Adhoc networking is a PITA and never retains the settings.I built this system on 3/24/12 so all drivers are the newest. My memtests come out fine. (BTW my ram modules in the attached screenshots are 4 identical modules, so the specs are the same for all.) See my profile for system details. The Bios settings are not OC'd, and are default as much as possible.The one thing I haven't tested yet is disabling both antivirus programs on the computers. The BSOD computer (the new one) has AVG 2012, and the other has Avast.I am using a different ethernet cable for the connection to the router than with the connection between the 2 computers (the one where no BSOD's happen is running outside so I really don't want to undo all the work.)