Kindly register your new serial number at www-server of Doctor Web, Ltd. Fill out attentively all the fields required. After the registration completed, immediately a license key file will be sent to your e-mail address. Unzip the key file from the archive and place it to the directory the Dr.Web anti-virus is already installed (in MS Windows it is usually C:\Program Files\DrWeb). A program will ask if demo key file should be replaced with the new Dr.Web license key file. Confirm the replacement. Dr.Web license key file will be placed to the Dr.Web installation directory (in MS Windows it is usually C:\Program Files\DrWeb).