The following settings control the installation of software in Windows XP.
Set Program Access and Defaults
Control Panel Add or Remove Programs Set Program Access and Defaults
Software, install or uninstall
Control Panel Add or Remove Programs
Software, install or uninstall (network components)
Control Panel Network Connections Advanced Optional Networking Components
Software, installation security policies
Group Policy (gpedit.msc) Computer Configuration Administrative Templates Windows Components Windows InstallerGroup Policy (gpedit.msc) User Configuration Administrative Templates Windows Components Windows Installer