Thank you for the reply, MPMEng. I received the Speedline UPG-026/27, but it actually came with the incorrect mouse. Since original post I've contacted seller, received correct mouse, successfully installed drivers, encountered a new issue.
At this point when I attempt to launch vgaspm.exe I get a new error, "ERROR 9999: INVALID INSTALL. PROGRAM TERMINATED." as seen in attached photo. If I attempt to launch the vgaspm.exe immediately after installing with no reboot, I get a different error; "DOS/4GW fatal error (1010): can't initialize loader LINEXE_LOADER (1)".
I've attempted restoring the system files present on the back up disk included with the machine, also attempted to re-install the upgrade version of the software and the mouse drivers, but have not been able to launch it since.
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