Use the command line to run msiexec /a "C:\temp\MVCI Driver for TOYOTA.msi" /qb TARGETDIR=c:\temp\mvci to force the extraction and installation on x64 systems.
The driver acts as a bridge (J2534 passthru) between the application and the USB hardware. autokent mvci multi driver x64 new
Always be cautious when installing unsigned drivers or disabling Windows security features. Proceed at your own risk. Use the command line to run msiexec /a