http://msmvps.com/blogs/installsite/archive/2006/09/22/136158.aspxWindows Vista introduces a security concept called User Account Control (UAC) which has multiple impacts on Windows Installer (MSI) based setups. Robert Flaming, Product manager on the MSI team at Microsoft, is posting a series of articles on his blogenCommunityServer 2008.5 SP2 (Build: 40407.4157)