Why it found a Win 7 Home license if it was upgraded from a activated Win 7 Pro? The Laptop has a Win 7 Pro COA sticker on the back but the last 4 digits are damaged so I can't use it as a valid key.

It says that it found a Win 7 Home license and that I should install Win 10 Home. It installed Win 10 Pro but did not Activate. I cloned the disk, booted into Win 7 Pro and ran setup from a USB Win 10 installation disk. I have a very good 8 years old Sony Vaio Laptop (Sandy Bridge i5, 8G of memory) with Win 7 Pro SLP license that was a gift from my nephew. Superfly's Showkeyplus utility may show more. (Note: All manufacturers that use the OEM SLP system are required by contract to include a Certificate of Authenticity (COA) sticker, that has a COA SLP key, on the computer) It is a valid product key, but should only be used in limited situations (such as if the OEM SLP key stops self-activating for whatever reason).

(that's why you did not need to Activate your computer after you brought it home)ī) COA SLP: This is the Product key that you see on the sticker on the side (or bottom) of your computer. So when Windows was installed using the OEM SLP key (at the factory) Windows looks at the motherboard and sees the proper OEM Bios Flag (for that Manufacturer and that version of Windows) and Self-Activates. This key is geared to work with the OEM Bios Flag found only on that Manufacturer's computer hardware. ? A) OEM SLP: This key comes pre-installed in Windows, when it comes from the Factory.

Windows 7 pro upgrade to windows 10