I always run Turbotax in admin mode and I also let it default install onto c: - although none of the 4 tekkies that I spoke with told me too. It's worth a try, but, in this case didn't work. A clean install on a different, hardware identical laptop was the only solution that I found to submit the 2nd state - that was after manual patch, windows update, uninstall/reinstall of TTHB24, a couple dozen trips to the TT update icon only to have no updates needed, blah, blah, blah.
I'm lucky, I had an extra PC laying around and it was faster to reinstall and move the .tax file than wait for the tekkie from TT to get back on the phone. Clearly this is buggy code that apparently doesn't like to share a PC with any other programs. Only a clean install on a freshly prepped laptop worked.
