I have an application developed under Access 10 and Installed using SageKey. I have successfully installed it on Windows 8.1 before and when it gave the Incompatibility message, there was a 'More Actions' button (or something similar) which allowed me to continue.
On my latest installation, this option was not available. I ran the Compatibility Trouble-shooter and tried every possible variation but nothing worked. The Trouble-shooter screen dump is attached.