During the installation process, you can be blocked on this status : Acquiring
This problem is due by few keys forgotten during the installation process because the previous version was installed with Windows.
To resolve it, you need to use a uninstaller program like IObit uninstaller : http://www.iobit.com/en/index.php
First, Uninstall Realtek by using the program
You will be able to scan if there is forgotten keys, use this option
After that, do the same for Nahimic
And do a scan for Nahimic too