There are numerous posts like this all over the Internet. It's not normally part of Windows 7 and you probably don't need it. It may be part of some software installed by your PC manufacturer, but generally speaking, as far as program design goes, they should not be putting stuff in the Windows directory/folder. It is probably safe to delete, with some caution.
I note that there is no reference to this anywhere on the Internet other than people wondering what it is - perhaps only you. I would suggest removing it if it is taking up a large amount of space. It would be interesting to see what is actually in those files.
Thanks for your reply, Mike. After seeing little initial response to this, and after more failed attempts to find further info on the net at large, I decided to take a chance on removing just a few of the files to see what would happen. Worse case scenario is that I'd irreparably crash windows and have to do a reinstall. (Not like it would be the first time
Experimenting very cautiously at first, one file at a time, I saw no ill effect whatsoever, verifying by running various windows-specific programs, word, excel, etc. and further moving/opening/creating/modifying general folders. Following this, I deleted all but the most current "autoshoot" file, and not only did I still not see any noticeable harm, but also regained 22G of drive space!
All's well that ends well, I guess, except that I'm still so very curious about what on earth it is, where does it come from, (it refreshes several times a day!) and what it's supposed to do, especially since removing it seems to cause no harm. I guess I just accept it as an oddball anomaly and dump it all together. This brings me to another query, which I'm not sure I'm skilled enough enact. If I delete the main US1 folder, and then it does automatically reinstall itself, is there some sort of command prompt I can create to prevent it from reinstalling?
Thanks again for your reply.