Unable to reinstall Adobe

Morning!

A customer of mine has run into an issue on their Windows 10 Pro workstation where their instance of Adobe Acrobat Standard 2017 was consistently requesting the reactivation of the program by relogging into the user account and reapplying the serial key. After the third day of this we moved to reinstall Adobe which has not gone well. Uninstalled through Add/Remove Programs and the software is still present and can open successfully and open files, but now is no longer present in the Add/Remove Programs window.

I have run through the Adobe Labs removal tool multiple times to try and clean the system of the install to facilitate the reinstall with no luck. The program still regularly requests to be activated again.

I need assistance with cleaning the software off the system so I can reinstall, and then figure out/ensure that the program will hold the activation.

Please advise, thanks!