A "Windows 7 Home Premium OA ISO" refers to the installation media for , the system laptop and desktop manufacturers (like Dell, HP, and Lenovo) use to pre-activate Windows at the factory. Understanding "OA" (OEM Activation)
COA (Certificate of Authenticity) sticker to reinstall the OS, Microsoft's official download site often rejects these OEM keys, directing users to the computer manufacturer instead. Recommended Download Methods Since direct downloads from Microsoft are now restricted for OEM users, here are the most reliable ways to secure a clean ISO: 13 sites Windows 7 Home Premium "OA", does the OA mean I can't ... Mar 18, 2015 —