How do I resolve an installation failure error message when installing Acrbat Pro 9?

Regardless of this issue, Acrobat 9 is not compatible with Windows 10 (which doesn't mean it won't run on it), so problems are to be expected.

When I bought CS5 Master Collection it came with 2 serial numbers... 1 for only Acrobat Pro 9 and 1 for everything else

Are you sure you are entering the correct number to install what you have?

Go to https://account.adobe.com/ to find a list of your programs and serial numbers

Two ideas that MAY work to install and/or run old programs in Windows 10

-RIGHT click the program icon or EXE and select a compatibility mode in the pop up option window

-or Run as Administrator http://forums.adobe.com/thread/969395 to assign FULL Windows permissions may help... this says Encore, but is sometimes required for ALL Adobe programs (this is NOT the same as using an Administrator account) so follow the instructions, substituting the name and location of your specific program for Encore

-also https://helpx.adobe.com/x-productkb/global/create-local-administrator-account-windows.html

Invalid Serial Number https://forums.adobe.com/thread/2359923

-and revoked volume number https://forums.adobe.com/thread/2477259

-Problems with software validation https://forums.adobe.com/thread/2273259

-Warning that software is not genuine http://www.adobe.com/genuine.html

-http://prodesigntools.com/dont-buy-adobe-software-on-ebay-craigslist-or-amazon-marketplace.html