In case someone else have the same issue...
-Add an exception to the GTL and the lowguard folder on the antivirus. (in this case was ESET32)
-In win7 give proprietary rights over the GTL folder to your profile (no matters if you have Admin level asigned)
-some times don´t know why GTL.EXE shows in red on lowguard, with the message that is use by another aplication, but after disconnect from the server an reconect the problem is solved and all looks green!
Now the problem is...I have to be faster!