There's no way to tell. Like I said there's no crash dump or blue screen or event in the log. It just locks up and freezes completly if I try to switch the wireless channel on the USB dongle. Alternatively it also freezes the same way every week or so during normal operation. For example two weeks ago I was editing a post right here on your forums when the computer suddeny froze in mid-typing.
Back on 32bit I bought a wireless PCI network card. Comodo also caused random freeze issues, though more often. I didn't switch channels back then so I don't know it it was the exact same issue. I loved Comodo so much that I uninstalled my PCI card and bought a Wireless USB stick instead, hoping its drivers would be Comodo-friendly. To my luck they were. (relevant thread
http://forums.comodo.com/bug_reports/301722lots_of_network_connection_problems_merged_topic-t19817.0.html;msg146182#msg146182) Now on Vista 64 Comodo's ticked off with the Wireless USB.
Polish up the drivers please.