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What OS (Operating System) does your NEW computer have?
Acrobat 9, wont work on newer computers, or newer OS's.
So, that may be the reason that your new computer wont take the Acrobat 9.
YOu might be forced into purchasing a newer version of Acrobat9.
Acrobat 9 wont work on Windows 8 or windows 10.
And it doenst work very well on Windows 7 either.
It was designed to work on Windows XP, as it is fairly old.
So, what is your OS on your new computer you have now?