I just downloaded Adobe Digital Editions to open a Google eBook that I recently purchased. I want to be able to open the PDF version. I authorized the program with my Adobe ID and then loaded the book into my library. I located it in my File Explorer and found the PDF file under the Digital Editions file. However, when I open that PDF, it says it's corrupted.
If your ACSM file is been successfully downloaded and you can read it without any issue in ADE, then your PDF book is fine. You can't double-click the PDF located in the File Explorer to open it with a non-ADE program, because the file has DRM protection. The program will say it's corrupted, protected, whatever, that's how Adobe DRM works, it restricts you to read only on authorized apps, and ADE is the only program to open ACSM on computer.