^saw similar issue with win7 security update..
I typically never turn off my 828mkIII hybrid as its also the desk mixer, but suddenly I lost 828mkII as audio device. futzed about, couldn't fix it so turned off everything and went to the pub..
next day I recovered 828 as audio device but Virus midi/audio was screwed..missing notes and glitches.. and so the sky fell.. and i went to the pub again.
about 2 days later some other update appeared and behold!..normalcy resumed, and i didnt go to the pub.
Microsoft owes me half a dozen tylenol...