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#11
I would think so yes, this utility will give you some good info on that. ShowKeyPlus If it says OEM marker in the firmware, that means there is an OEM SLIC table in the BIOS. Then just google the last 5 or 10 digits of the product key to see if its an OEM-SLP key. The keys on both PC's will be identical if they the same version of Windows 7 and are OEM-SLP keys. And they won't match the key on the COA sticker. Assuming they are still the original factory install. If one of the keys matches the COA sticker, somebody reinstalled with stock install media. Nothing wrong with that, its how you have to do it if you don't have the custom factory install disks on hand. If you want to post a screen shot of showkey, first click on the displayed keys. That will X out all but the last 5 digits and keep the info private to you only.
I have to take a break for a while. I suffer from chronic back pain. I may not get back online until tomorrow. I'm sure the others can help you out if you have more questions.