Sounds like you installed an HP OEM Pre-Activated Version of Win 7. You can run the Loader by Daz and click on Uninstall and reboot then re-install the ASUS Certificate and Key.
Try running Everest Ultimate Edition or CpuZ and see if the list it on the Motherboard tab (Google them).
I think Juan was asking you to check on the Mainboard tab to see what revision of motherboard you have. The above screengrab appears to show the Internet what video card you're using.
That is probably correct but you should probably Run AFUWIN and click on the save Button and upload a back up of your existing BIOS to be modified just to be safe.