Because Plesk didn't allowed me to change the machines IP. (it kept giving an error message) I decided to uninstall it, and then reinstall with the new IP. However the uninstall failed with errors and there was no way i was able to reinstall plesk. I tried everything i could think of (manual folder deleting, registery entries removed, user and groups of plesk removed, etc) nothing helped! It's impossible to uninstall or reinstall it. Eventually i just gave up and formatted the machine. Note.. this was a clean installation. Something is seriously wrong with the Plesk setup/uninstall. Please confirm and fix it.