How to recovery license windows 7?

[WPCentral Question]

My laptop, I set a new windows 8.1 by remove drivce:C, but i have recovery partition, now I want to recovery my windows 7 back, How can I do? please kindly to help.

 

[RumoredNow]

IF the Windows 7 was an OEM copy, meaning it came from the store originally with Windows 7 preinstalled...

Get this utility and run it. ProduKey - Recover lost product key (CD-Key) of Windows/MS-Office/SQL Server

It will show you a "Windows (BIOS OEM Key)" entry.... That is the key for your original install.