I'm trying to install Ad-Aware 2008 which I downloaded from download.com and I get the following message about half way in: "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. " The same download ran fine on my other computer. I ran a forum search but couldn't find this exact problem addressed. Please advise how to fix (using XP-Home).