An old thread, but maybe someone can advise. We have a mixture of Windows 7 desktops and laptops and 8.1 tablets, and EG 5.1. Recently one or two people have requested EG on their tablets but the installation has failed. I advised that it wasn't supported on Windows 8, which I drew from the system requirements document http://support.sas.com/documentation/installcenter/en/ikeguidesr/65195/PDF/default/sreq.pdf. But then, just to confound me, it turns out that a few people have been using EG 5.1 on Windows 8 tablets for a couple of years.