🚀 go-pugleaf

So far as I can tell from what you say-the problem is in the Registry. Try using the Windows Install Cleanup utility along with the others again. You may still be forced to go into the Registry manually. Both CCleaner and the Ashampoo programs get you close, as will the Win one. Just remember that ALL references have to go, including the actual folders for Reader. I left Photoshop Elements on my machine and it was not affected, btw.
The Registry is daunting. However, you can edit it if you are very careful. I understand that do so can be a dangerous endeavor and one does it at their own risk! You will find that the tree in Regedit is easy to work with if you go slowly. When in doubt-don't delete.
As to your online banking-I have never seen Adobe PDF used by the banks I use (both nationals). You can contact yours and ask to talk with their IT people. I did that early on with mine due to issues with Quicken. Problem was eventually solved with a software upgrade.
Good luck