Use the link I gave you in my post. It will let you download office. Here's the link again-- [URL]  Do not reformat before reinstalling windows or before returning to factory settings. Factory restore will take care of that. If you want to return to factory settings, you do not use F8 to restore windows if your computer came with windows 8. Go to PC Settings, Recovery and select it there. You will have to update to 8.1 again and all the windows updates.
Hi, I have intentions to reformat my XPS. I have bought my XPS in 2013,  pre packaged with MS Office Student Edition. I can't remember how I activated the MS Office when the pc arrived, I don't recall having to install from a CD (correct me if I'm wrong). My concern right now is how do I get a working MS Office if I reformat my PC? If I flash my drive, will MS Office be there?  Does Dell has a special software to help with reformatting so that I do not have to reinstall the drivers one by one?
Reformatting XPS - Microsoft Office