Error Installing Software on a Terminal Server
Description – When installing software on a Terminal Server you receive an error that says, “Only administrators have permission to add, remove, or configure server software during a Terminal services remote session. If you want to install or configure software on the server, contact your network administrator.” You receive this error even if you are a local administrator.
Solution 1 – Log in to the console or RDP to the Console/Admin session. Use “mstsc /console” on Windows Server 2003 or “mstsc /admin” on Windows Server 2008.
Solution 2 – Browse to HKLM\Software\Policies\Microsoft\Windows\Installer. Create a DWORD value called EnableAdminTSRemote & set it to 1