So, the problem I whose solved myself. How ? By formating with Parted Magic the "C" in GPT (again), because the windows 10 installer said me that there is an GPT partition than allready exist and is...

:), listen, perhaps you don't undestand me. The computer is totaly frozen, so it's impossible to instal/remove something, even shutdown sometime doesn't work, meaning fisical shutdown button.

So, I wil be grateful if you told me how whose possible to start it in safe mode, cause I could't .....I use all "F" keys but whoesn't possible to iniciate in safe mode ( I whose interested to start...