Strange Issue with Windows 8 Activation on Refurb Tablet!

Hello I recently purchased a manufacture refurbished Lenovo Thinkpad 8 tablet with windows 8.1 pro. All was good until I turned the tablet on and saw the small text at the bottom right of the screen with the version of windows I was running and the build number. I went to check the activation status and it says it's unactivated and the product key it's using won't work. I've never come across anything like this before. The key is built into the system and should always work at least it did in windows 7.

I did some research online and people said you could download a windows 8.1 iso from microsoft to reinstall an oem version and if it's the right version it won't ask for a key during install it will read it from the bios. So I downloaded the Pro, Core, and the single language Iso and all three ask for a key before installing.Should I try installing one of the iso's with the keys I do have? I would really prefer not to return the tablet? It took long enough to get it and I was hoping I could avoid waiting even more. Any help would be greatly appreciated.

Here's what ShowKeyplus is telling me about the Product keys on the tablet.

Windows Product Key Information


Product Name: Windows 8.1 Pro


Product ID: 00262-50050-00000-AAOEM


Installed Key: *****-*****-*****-*****-9P9HP


Original Key: *****-*****-*****-*****-PWD3X


Original Edition: Win 8.1 RTM CoreSingleLanguage OEMM


OEM Key: *****-*****-*****-*****-9KWJQ


OEM Edition: Win 8.1 RTM Core OEMM