As far as I know, I'm the only user on the system. The computer was a gift, but it was reformatted and everything installed from a clean windows install... so if there's an administrator account, I don't know about it.
I did upgrade my screen reader from Jaws 15 to Jaws 17, but don't see how that would effect admin access... Other than that, no. I was trying to reinstall an application that I had accidently uninstalled, and I got the notice for the first time then; when I tried to download it and when I tried to just run it from the site. It seems to be effecting everything that I try to install now.