I have ASUS K95VM and was Original delivered with windows 7.
Asus comment
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According to our information your notebook came out with Windows 7.
We cannot provide support for configurations other then the original.
However I can provide you with the following information.
If the Secure Boot Control function is not present in the BIOS, then you can only get rid of the (error) message by converting the diskformat to MBR.
You will have to format the HDD/SSD, so all the data will be wiped.
You can find a guide / tutorial about converting HDD/SSD to MBR on the websites below.
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So , thats no real help is it?
Now we are waiting for help from Microsoft.