Hi,
no problem with win7, but now I'm using win8.1 and when I try to launch liberkey.exe 5.8.1, the response is "liberkey need to have write access to device where is installed".
Can you help me, please.

If Liberkey folder were created with another user (or from previous Windows installation ?) than you are trying to use it, you have to add user rights to write to the Liberkey folder.

Oh! thank you very much.