Hi,
Please first check if your PC meet the requirements:

I have tested on my computer with Windows 10 1607, Garmin maps can be installed properly: please download the latest one and install it again in clean boot mode to avoid 3rd party conflict.
https://www.garmin.com/en-US/maps/updates/
Please Note: The third-party product discussed here is manufactured by a company that is independent of Microsoft. We make no warranty, implied or otherwise, regarding this product's performance or reliability.
Boot into Clean boot mode:
How to perform a clean boot in Windows
https://support.microsoft.com/en-sg/kb/929135
If your issue still persists, please let me know the certain errors during installation.
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