Hi [B]Coinman49[/B], thanks for your feedback.
Please go to "Control Panel\Programs\Programs and Features" to uninstall MusicFab. After that open My Computer and go check if there is any related file left in C:\Program Files OR wherever you installed MusicFab, manually delete them. Also, please go to Documents to delete the MusicFab folder.
After that, please download and install the offline version of MusicFab https://download.musicfab.org/mlink?p=MusicFab_x64, and then right-click on it to run it as administrator to see the result.
You can try to add the software to the trust list of antivirus software or firewall to prevent the software from being blocked.
If still have a problem, please take a screenshot to show us and give us the log file here, thanks.