In any cases, there is no need to separately download OEM or retail version of Windows 7 RTM installation DVD ISO, as the retail version of Windows 7 installation can be easily converted by simply using the correct product key (e.g OEM_SLP product key can convert a retail Windows 7 installation to OEM version), as product keys issued by OEM has different base from retail product key. Check out what’s the differences between various kind of OEM product keys. The non OEM SLP key, from product key group ID 182, is similar with retail or upgrade product keys, it can be used only on one computer. Instead, Windows 7 RTM OEM DVD disc ISO requires OEM NONSLP product keys to activate online or by phone, exactly similar with a retail product key, which distributed and supported directly by Microsoft, or OEM COA serial numbers pasted on sticker of new PC. This OEM version of Windows 7 RTM ISO is not to be confused with brand-specific Windows 7 recovery disc or image that distributed by major PC vendors, which make use of OEM-specific digitally signed certificate (.xrm-ms) that matching with BIOS ACPI_SLIC table and OEM royalty SLP (System-Locked Preinstallation) product key for instant offline SLP self-activation. The Windows 7 RTM OEM ISO is a non-brand specific image released to OEMs (Original Equipment Manufacturers) and system builders, which in turn distribute and support the Windows 7 OEM disc to end-users. Other than retail channel version of x86 and 圆4 Windows 7 RTM final gold DVD ISOs been leaked, the OEM version of Windows 7 Ultimate RTM original untouched and unmodified DVD ISO images have also leaked to Internet.

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