Earlier this week, we were tipped to a page on Microsoft's Surface website claiming that the official Surface Ethernet adapter could finally work on the Surface and Surface 2 tablets if they used Windows RT 8.1. Unfortunately, Microsoft later told us the information on that page was incorrect and removed that statement from the site.
As it turns out, there is in fact a way to enable the Surface Ethernet adapter but it's a tad complicated and could lead to some issues down the road. It's described in a blog post from Paul Deane, who found that Windows RT 8.1 now supports the Realtek USB FE Family Controller driver and the Surface Ethernet adapter happens to have a Realtek chip inside.
If you really want to use this add-on with your Surface or Surface 2, again with Windows RT 8.1 installed, here is how you proceed, according to Deane: