Hi Georgen,
As per the description above, the installer of Acrobat Reader DC stuck at 50%, Is that correct?
Please try the troubleshooting steps from the following link: Troubleshoot Adobe Acrobat Reader installation | Windows
If the issue persists, please use Adobe cleaner tool to remove all the installation files related to Reader: Download Adobe Reader and Acrobat Cleaner Tool - Adobe Labs (For Windows OS).
For Mac, Run the uninstaller file of Acrobat Reader from Application menu.
Restart your computer, and then try to reinstall the Acrobat Reader DC: Adobe - Adobe Acrobat Reader DC Distribution
Keep us posted with the results.
Regards,
Anand Sri.