Seemingly no change. After the install of the Firewall, I updated the firewall and utilities (apparently mcAfee won't allow you to keep your signature files updated after one year, but it will allow you to update the rest of the suite, the Shredder, the Firewall, et. al.) All during the download of the updates (which, at 36.0Kbps, was not fast), the firewall periodically notified me about attemtps to TFTP to someplace, which I continued to manually reject. (I don't want to set the firewall to automatically reject them, because I may actually need to do a TFTP sometime, and un-blocking something you've previously blocked is a pain-inna-arse.) The log gave no indication as to the target of the TFTP attempt -- hell, it wouldn't even log that an attempt took place. After about a half an hour of this, SVCHOST dutifully attempted an illegal access and crashed...taking the clipboard with it -- just as before.
However, I saw no evidence of the other problem, of the SVCHOST truing to UDP to someplace. so maybe It helped a bit. Further monitoring is needed to verify.
I'm tempted to let the TFTP go through, and then scan the snot out of my system to see if I can find out what is trying to be downloaded.
Thanks for asking!