I bought a new GFs1060 and it didn't fit the BIOS version. Then I bought GFs 750TI and it also didn't fit asking for UEFI. Three local BESTBUYS and Fry's stores and me personally are greatful to HP for this. Then I read forums for two days and found a new BIOS version with UEFI on HP website. I did upgrade the BIOS and it is working!
Now the question is: will a new graphic card work with this version of BIOS? Can I go to the store to my old fiends to buy a new graphic card or I can only use non-UEFI cards still because this update didn't fix anything?