I get the same message when trying to install Space Pad instrument in Music Maker Version 25.0.1.33 on both Laptop and Desktop.
Laptop Lenovo Notebook, 6GB Ram, Intel Pentium CPU 2020M @2.40GHz Processor, 64-bit Operating System, Windows 8.1
Desktop Lenovo A10 300, 8GB Ram, Intel Pentium CPU 4405U @2.10GHz Processor, 64-bit Operating System, Windows 10
The Space Pad did work initially on the Desktop but every time I closed the programme the next time I opened it the Space Pad was missing and had to be uninstalled and then reinstall to get it back. It stopped working completely yesterday and just sent error messages (see second screen shot below). So I uninstalled everything and started from scratch and now get the "installation failed" message. I installed it yesterday on my laptop to see if it would work on there but the same message comes up on both computers. The Space Pad demo plays fine on both laptop and desktop.
Any help/guidance will be very gratefully received!