Message about color theme every time application starts

Hi renér5933855,

Assuming you have Acrobat Reader installed on the machine, could you please try the steps given below:

Restore Reader preferences, (for Windows)

Close Acrobat Reader

(ii) Go to C:\Users\your username\AppData\Roaming\Adobe\Acrobat\DC 

(iii) Move the entire DC folder to some other location like temp folder.

     To view temp folder, press and hold Windows key and press R on your keyboard, type temp in the run dialogue box then press enter.

       If App data folder is not visible under your user name, type %appdata% in run dialogue box and hit enter

(iv) Restart Adobe Reader.

Could you please confirm the application installed on the computer- Acrobat Reader/ Adobe Acrobat?