It worked, but the weird thing is that I could open a new wallet on the same computer that is synchronizing, the older one is still stuck.. Thank you do much for your help, and if you have any idea how to unstuck my old wallet I will be happy to hear about it.
Do you mean you could open a new electrum wallet on the same computer? If that's what you mean and you now have the private keys from your old wallet you could either import them into your new wallet, or sweep them into it. These two links explain how to do it.