Hello, i recently created a new pc and installed Linux on it, only to install windows later. However I have a Windows 8/8.1 product key and I'm wondering how do i install windows 8/8.1 without a previous version of windows. Microsoft claims I need a previous version of windows to update/upgrade/etc. but I dont even have bakups of previous images(or it wont run) and now I don't even know of I can do it without buying a disc. Any help will be appreciated on how to resolve this issue.