You have been invited to install a software that will allow a remote operator to fully access your computer remotely including the desktop and files. Only follow the instructions below if this invitation was expected and you know who will be accessing your computer. Selecting your operation system and follow the instructions below.
To install, cut and paste the following command in a root terminal.
Download the installer here, right click on it or press "control" and click on the file. Then select "Open" and follow the instructions.