Windows 7 Professional SP1 32bit (OEM) System Builder DVD 1 Pack (New Packaging) This operating system is eligible for a free upgrade to Windows 10 when available. More details below. Make the things you do every day easier with improved desktop navigation. Connect to company networks easily and more securely with Domain Join. This OEM Windows product IS NOT an upgrade product. This Windows product does not come with Microsoft support and requires a clean install, which is complicated and will not save anything currently on the computer. System Builder OEM Windows is intended for Pre-Install on a new PC. This product ships in a white envelope. See below for more details.