My old computer died so I had to replace it with a new machine. I have a purchased copy of Acrobat Pro DC 2015 release version 12.0 on DVD that I am trying to install on my new machine.
Once I install the software I get a message that I need to sign in.
When I click the sign in now button I get a message saying "Update required Your browser or operating system is no longer supported. You may need to install the latest updates to your operating system.
If you are running the latest Adobe software and still see issues, make sure that Internet Explorer 11 is not set to Compatibility Mode, Legacy Emulation Mode or a document mode prior to Internet Explorer 11. Learn more about Internet Explorer Document Modes.
If your organization isn’t able to turn off compatibility mode, you can create a per-product exception using the registry keys below. The example below will force Acrobat into Internet Explorer 11 mode; you can add additional keys for other Adobe products as needed.
Download the file with the registry entries as described in the help page shared earlier and check