WIsh he had come her before going back to the 1511 build. We probably could have helped him fix the problem.

Ah well, another perfect example of why doing regular image backups is SO SO SO important. Especially if you are running a business from it.

@Imageman, once you get your system back to where you want it,

BACK IT UP!. The best way to do this is to use Macrium Reflect Free to make an image backup to an external hard drive. If you don't have an external hard drive now is a good time to get one as regular backup should be a part of your normal process. You can get a 1TB external hard drive for $60 (less if on sale).

Setup a regular, scheduled backup, at least every week. If your business runs Monday through Friday then have it set to run after business hours on Friday. It would be a really good idea to have at least two external hard drives and rotate them every month or so, keeping one off site, perhaps in a bank safety deposit box.

That way your business should never be down because a hard drive crashed or Windows 10 crashed. Just restore the latest backup and you will be up and running in 30 minutes ir less, even if you replace the hard drive.