Tanner,
I tried adding the key suggested in the link, but no luck.
One thing I noticed once while generalizing the image was that it would briefly flash that updates had been turned off before it shut the image down for capture. I will try quitting the sysprep gui instead of shutting down after generalizing to see if I can go back in and turn updates on.
I haven't been able to test this yet since my vm image won't PXE boot for some reason... another thing to figure out.
Thanks for the suggestion.