It is an easy fix enough but Adobe is not interested at all because the new model is so sell you the subscription services. I cannot understand within this Adobe Forum, Adobe is not willing to help or to give some proper answers. I reinstalled my acrobat 9.0 today on Windows 10/64bit and by changing the date - it went through with no issue. Try this which i have posted in another thread. I know this has been a serious issue for many frustrated users. Can you imagine how frustrated i have been over the last 3 years - googled everyone and no simple solution. I have 5 desktops with acrobat 9 pro and 1x acrobat 9 pro extended. Whilst doing the fix, you might encounter issues with firewall / but otherwise, it should go through easily.
Rayruppert, Why dont you try this and let me know how get along / i did mine yesterday and it worked on a machine windows 10 /64 bit with the Acrobat 9 pro.