I am working on a Dell Inspiron 560 for a friend and I need to reinstall windows 7 on it, however my friend did not have the Dell operating system installation disc needed to reinstall windows 7. However, I have a copy of windows 7 (same version, Home Premium) OEM. Is it possible to use the OEM disk to reinstall windows 7 but use the Dell key on the machine to re-install windows 7?