RE: Window 7 genuine while upgrade to Window 10 than it becomes pirated
Microsoft should have your product key and information from when you upgraded to Windows 10. It sounds like there is a glitch with Windows 10 and their license verification service and as such you would have to deal with Microsoft on that issue. If Microsoft cannot or will not do anything about it, you will have to have your key in order to validate your license. Dell will not have a copy.