In dealing with another instance of this, we found that the inability for the installer to properly install the VS redistributables was the culprit and that once the operating system was fully updated, things started to work fine. See this thread for more details, but the bottom line is that on the older platforms (especially 2008) you need to make sure that all the published MS updates are in place, then install 19.1. This should work - but if there are still any problems, try to install the VS residributables by themselves - if that isn't successful then DF 19.1 won't be either.

[edit] or just read Harm's post - he beat me to it