Once I restarted my pc and it is working only with 4 core instead of 6 ones.
I have done all the procedures I found on internet, but they all failed.
On the prtscrn 3, we can see all the six core, but my pc crashes many time in some games, even on low textures.
On the prtscrn 2, I can't choose more than 4 cores. Last year I could change, but since January, I couldn't do it anymore.
Memory Ram 8GB DDR3 1333 Markvision
Vídeo Card AMD Radeon HD 7800 Series
Motherboard Gigabyte GA-78LMT-S2
HD Seagate 1.0 TB SATA 7200RPM
Font ATX C3 Tech 500W Real - PFC Ativo - 8o Plus