Hello, guys I searched the forum but honestly I did not understand anything I have a Lenovo Ideapad Y510p with OEM Windows 8(Single Language) But I formatted my PC and installed Windows 8.1 VL Win 8 pro. And When I am doing that I lost my back-up Now when I try to install windows 8.0 I got and error that says "The product key entered does not match any of the Windows images available for installation. Enter a different product key." Is there a way to restore my oem key? Please help me Note: I am also using KMSpico