Hi phillibob41,
I am sorry to hear that did not work for you. Did you disable the Hybrid mode in the operating system and in the BIOS? It needs to be done in both places. There is a BIOS update for Windows 8 for your computer, did you update that?
If you have done everything, then you are looking at doing a system restore back to when you upgraded to Windows 8.1 and doing a complete Windows update and then upgrading again. As there is something wrong with the install of the upgrade.
I hope this helps, let me know how it goes.
Thank you,