Serial number tag does not match the serial number in bios. I just bought a used Lenovo Thinkpad off eBay. Received it yesterday and I noticed the serial number tag on the bottom was a little torn. No concern to me, at least at first. I also ran the s/n from the tag to see if it had any warranty time left on it. The s/n on the tag shows the warranty expired in 2011. Okay, as wthis as expected. So, I was checking the system out to ensure it was okay, the settings were correct, and I noticed the...