Hi again, i finally found the solution to my problem with the BT, this PC "HP4540s" has a function button for the WIFI and Flight mode, i get into the Bios and unchecked this function, i don't use then in a Flight.
Now my BT works awesome both to Pair and get detected from other devices.
Just hopes that this can help anybody.
Forget about this, the BT isue is back today
"LAST UPDATE i clean reinstalled Mavericks, but before that i removed the WIFI combo card from the PC, then installed kexts w/o editing those and now BT and WIFI work again, will see how long.