I am downgrading my Dell laptop from Win8 (which came preinstalled) to Win 7. I purchased a copy of Windows 7 from NewEgg.com but the packaging states "Intended for system builders ONLY ... If the individual software license is for a desktop operating system ... it also must be preinstalled on the hard drive ... using the OEM Preinstallation Kit (OPK)."
Since I'm not a system builder and am downgrading an existing installation, can I use this installation disk? I don't want to open the package and make it unreturnable if it turns out I can't use it.