Here's some more information to help:
The Chegg e-reader is web-based. You sign in on a web page and select your text. The web-application then opens the book and provides the capability to turn pages, select a chapter, save your place, etc. All things to help a student. The web app works great on my PC but freezes the web page for an e-textbook once is displays the page that you have selected a chapter or selected to return to where you left off. The only option is to quit Internet Explorer. I contacted Chegg and they said it was a Microsoft problem and didn't provide any useful information on unusual features of their web-app that might be causing the problem. I don't see any unusual Internet Explorer add-ons on my PC which displays things properly.
The app that is mentioned in the initial thread is a separate feature that Chegg sells. It's not related to our RT problem. I suspect that there's something that is trying to write to the RT and is being blocked as the Chegg web-app on my PC asks to use some memory after I've viewed a few pages. I've got 8 GB of memory on my PC versus only the standard on my Surface RT.
Chegg’s new e-book reader is practical, comfortable, boring. This is especially the case as laptops replace notebooks and the sound of clicking becomes expected white noise against the teacher’s voice. Many companies have taken to converting textbooks to PDFs, but that’s it, they’re just PDFs.