Can you give a description of what the computer was doing during that logged session with LatencyMon?
Also confirm that the logging session was only 1 minute long, as that is it looks like from the LatMon status bar?
FYI: USB WiFi cards are not a good idea on W7x64, they're frequently running on Vista-based drivers that often cause issues, including BSOD crashes. If you can, connect via Ethernet cable or look for a good PCI/PCIe WiFi card (I usually download their latest drivers to check the individual *.sys driver dates for anything I'm unsure about - 2011 and later should be fine, earlier than 2010 are likely to be risky).
The Speccy data says you were connected via Ethernet during that scan, disconnect your USB WiFi device and test without it; better still, uninstall it from Device Manager and also uninstall the software/drivers for it when prompted. Test for a few days.
