Computer Configuration\Administrative Templates\Windows Components\Windows Installer
Prohibits Windows Installer from generating and saving the files it needs to reverse an interrupted or unsuccessful installation.
This policy prevents Windows Installer from recording the original state of the system and sequence of changes it makes during installation. It also prevents Windows Installer from retaining files it intends to delete later. As a result, Windows installer cannot restore the computer to its original state if the installation does not complete.
This policy is designed to reduce the amount of temporary disk space required to install programs. Also, it prevents malicious users from interrupting an installation to gather data about the internal state of the computer or to search secure system files. However, because an incomplete installation can render the system or a program inoperable, do not use this policy unless essential.
This policy appears in the Computer Configuration and User Configuration folders. If the policy is enabled in either folder, it is considered be enabled in both, even if it is disabled in the other folder.