Potential problems with patching latest Navcore 21.2 and MDC

remove the patch with nav4free.bat, in menu 6) Advanced Operations, 5) Remove the Patch.
with deleted patch connect MDC Install map, check on the device that you do not have the sound disabled, if you still do not voices, in MDC check voices look those that give error if you persist uninstall voice that do not work and install again, if you remain without a voice I could be sotware problem.
if you have solved it you can already install patch and radars or what you want.
regards