Hi!

I've found a solution!

At the present time,I'm on another computer. I've try to install bitcoin core : successfully!

So,I'm gonna exchange the "wallet.dat" of this software,with the other "wallet.dat" from the software of my computer. When it will be finish,I will send my bitcoin to my new bitcoin adress : I've downloaded Electrum.

If it doesn't work,I'll be back here for more help!


But,thank you for your replies! Have a good day,and merry christlas!