Brett's friend has a laptop running Windows 7 that he upgraded to Windows 10. But it keeps crashing. If she resets it, would it lose the Windows 7 installation key? What she can do is authorize it for that computer. Then reinstall. It'll fix the problem. Hit the Windows key and type system. If it says Windows is activated, then she can wipe the drive and start over with no worries about losing that activation. Also, make sure she gets all the drivers for that model (Dell).