1. Reader supports all the popular operating systems currently in use:
iOS 8 or later
Windows 7, 8.1, 10
Mac OS 10.8 or later
Android 4.4.4 or later
Please check to make sure if your device is running one of them.
2. Proper installation and operations require that the device have all of the recent updates released by the operating system developer installed. Check to make sure that all such updates have been installed.
We recommend reading these articles provided by Microsoft:
We cannot guarantee the proper functioning of the Reader if you are using an unlicensed version of the operating system since it may not be eligible for required OS updates.
3. You should have .NET Framework v. 4.5 or later. Please use Microsoft Web Installer via the link: https://www.microsoft.com/en-US/download/details.aspx?id=48130 to automatically determine and download only the applicable components.