i dont have the wallet.dat just my old adress... so o loose my coins?
If you have privatkey of your address - you can return all balance. So, if you haven't it - I'm sorry.
how can i get that private key?
You can't. It was associated with your address & Espers wallet. I would consider Unformating my OS if it is worth it. I would not bother for 10 000 Espers. It all depends how many coins you had.
is win 10 but i can't unformat it because before the formatation my OS was corrupted... i hold 500k espers in the old wallet... well just forget i lose the coins... thanks to all