Install Adobe Reader

Dear Tasos, I would like to ask if it is possible to install Adobe Reader. There are some features, such as e-sign, which with the suggested app (explorer) that pdf files currently open, I am afraid these features are not supported. If I am mistaken please can you provide further information on this? Otherwise, could you please assist the installation since the process is password protected? If it helps I have already downloaded the application (you can check downloads folder). Thank you!!! Best, Konstantia