Hi Jenifer:

Thanks.

I actually figured it out yesterday and posted the solution to this thread, but I got a message saying that my message was to be reviewed by a moderator--and it's still not posted here (as of now).

After looking around the internet a bit I saw that the VC++ 2017 Redistributable will remove the VC++ 2015 Redistributable upon installation. The VC++ 2017 Redistributable is supposed to take the place of the the VC++ 2015 Redistributable, and supposedly software looking for the VC++ 2015 Redistributable will use the VC++ 2017 Redistributable. I had installed Visual Studio Pro 2017, which had (I'm pretty sure) overwrote the VC++ 2015 Redistributable with the VC++ 2017 Redistributable.

My solution: Uninstall Visual Studio Pro 2017 (which I don't use), uninstall the VC++ 2017 Redistributable and then in Control Panel -- Programs click on Visual Studio 2015 and on the following dialog click Repair. This will, among other things, reinstall the VC++ 2015 Redistributable.

Note that the VC++ 2015 Redistributable will NOT install if the the VC++ 2017 Redistributable is installed.

If you use both VS 2017 and VS 2015, I suggest you just run the repair on VS 2015 without removing VS 2017--not sure that will work, but it's what I would try.

Hope this message gets posted--as installing IS 2018 was a very frustrating experience for me.