Since Windows 8 Microsoft has made a change in which the product key is delivered to the customer.
Earlier the Product key could have been found on the windows sticker on the windows machine.
Now, most likely you won’t have a product sticker anymore. Instead, they save the Product key in our BIOS/UEFI. This is a pretty nice feature, since now when we reinstall windows it will automatically retrieve Product Key from the BIOS/UEFI.
To retrieve the Product key:
- Download RW-EVERYTHING.
The download can be found here:
http://www.majorgeeks.com/files/details/rweverything.html
Choose the RWPortable. Download it and run the RW.exe - Go to the ACPI button and click on the MSDM. Viola! You have your product key.