I also tried loading a game after launching Skyrim directly from Steam (rather than from the SKSE launcher), and I tried starting a new game. Same problem.
The only mods I'm using are the Unofficial Skyrim Patch, SkyUI, and Categorized Favorites Menu. I haven't had any problems with anything until now. I don't know what's going on, but I want to play! Please help!
Thanks,
John
(I posted this in the hardware/software forum, but I'm not sure if that forum has as big of an audience, so I posted here too just in case.)