I purchased a used surface pro 3. It is wonderful, but I recently did the windows 10 upgrade and lost my office suite. I do not have the product key as I did not get the original packaging. Is there any way to get it back w/o having to re-purchase? If not is there any way to revert my Surface Pro 3 to windows 8.1, and would this resolve the issue?
Also this is the only program I have noticed missing so far, is there anything else I should be aware of losing?