When I got up this morning, I found "autofileplus-setup.exe" on my
computer. A search led me to the information that it's a calculator
and data manager for driving. Fine. Wonderful. I didn't ask for it
to be on my computer. I have no idea where I might have picked it up.

No damage seems to have been done, and it's not listed in programs
installed, so I'm deleting it. I'll run my antivirus and antispyware
programs before and after deleting it.