You may receive the following error message when attempting to add a Vista PC to a Small Business Server domain using the SBS wizard (http://servername/connectcomputer):
“The Small Business Server Networking Wizard was not installed. You may not be a member of the local Administrators security group on this computer or your Local Intranet security settings may be set to High. Click Connect to the network now to try again and click Yes when prompted. If the wizard fails to install, contact the person responsible for your network.”
To resolve this issue, you probably need to update your SBS server to support that Vista PC. The update is commonly referred to as “Ripcurl”.
Read more at the official SBS blog: