I've got a new server running Windows 2003 service pack 1, I've downloaded Plesk 7.5.5. for windows. I get the following error message towards the end of the installation. "Error 1722.There is a problem with this Windows installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor." I've tried: http://support.microsoft.com/?kbid=829359 http://www.java.com/en/download/help/error_1722.xml But I still get the same error. Any advice much appreciated. A bit of a show stopper.