If you have windows XP try to restore the computer to before you put the cd in. Otherwise try to run the cd again and see if it has the option to repair/remove. Otherwise find the file it was saved in and open it up and see if there is a file maked remove/uninstall. You could even look for this by going to search and then have the computer look for the uninstall file in the C drive - if you see this under the tiscali file open it up. You could even email tiscali support or look on their website for technical support.