Windows Upgrade Scenarios for OEMs. 05/02/; 3 minutes to read; Contributors. In this article. The Windows upgrade retains the majority of OEM customizations, including OEM branding, apps, help and support information, drivers, and OEM store listings. Jul 17, · Our company has a task to reinstall OEM and retail purchased machines (Dell and HP, preinstalled Windows 7 and 8) (for example when a person leaves the company or in case of malware). The idea we have it to take a machine of each model and image it (either using tool like Acronis or capturing WIM files with DISM). Apr 24, · Windows 8 OEM ISO Download Windows setup product key embedded in the BIOS or EFI, allowing you to store it for safe-keeping or use it to reinstall Windows with an official Windows setup image." You can also use: "Belarc Advisor - Free Personal PC Audit (Version c)".