If you have Acrobat you don't need REader anyhow since Reader is only for viewing PDF's and Acrobat has that covered already.
Besides, what's the difference between Adobe Acrobat and Adobe Reader?
Basically, Reader can do just that: Read PDF files and perform some very basic tasks like allow the user to fill in form fields and add some highlights. That's it. Acrobat can be used to create PDF files from other formats, edit them in various ways, add form fields, security settings, etc.
Subsequently, question is, do you need Adobe for PDF?
To read and print a PDF file, you must have Adobe® Acrobat® Reader installed on your PC. You can download a version suitable for your system, free of charge, from Adobe. Adobe also provides tools and information to help make Adobe PDF files accessible to users with visual disabilities at http://access.adobe.com.
Can I use Adobe Acrobat without signing in?
Install Acrobat without Signing In with Adobe ID. You are using Acrobat DC Classic. You said that this is a RETAIL serial number so disabling Sign-In isn't really and option. If it were a VOLUME then you could do this via the Adobe Customization Wizard DC by using the Grant Offline Exception feature.
Why is Adobe Acrobat so expensive?
The Argument they make is that the new creative cloud cushion model gives users access to many more applications than before. Because there is no competitor in this field. That is why Adobe charges the so much cost and In Return give the much more functionality. What is similar to Adobe Acrobat but less expensive?