Adobe Reader DC won't open Internal error has occurred.

Hi troys,

As mentioned above, you are getting internal error occurred when trying to launch reader, could you try installing the latest patch for reader from here and check if that works: Adobe software and product updates 

Reboot the machine after installing update and try again.

You may also refer to the following forum threads discussing the similar issue:

Internal Error - Acrobat DC

adobe wont open says internal error (Acrobat Reader)

Thanks,

Shivam

Might be there is a problem in your hardware and check whether your system is meeting the installation requirement.