Sorry for my noobishness,the tool/installer woks well, adb finally is up in my ooooold computer. Thanks to all for the help. Im a noob and dont knew how to open cmd window properly, im tried to open from the desktop and adb, of course, dont run. Finally google help me.
On other side, just for clarification:
That atachment was taken when trying to install the tool for second time maybe is the reason of setx dont will to be installed properly.
Sorry and THANKS again for this noob-proof installer.