This property allows you to indicate whether or not you want to overwrite a file if it already exists on the target system.

Set this property to Yes to never overwrite the file if it exists on the target system—regardless of the file version.

Set this property to No to do the following:

- If the file version on the target system is newer than the version being installed, the file on the target system is not overwritten.
- If the version being installed is newer than the file on the target system, the file on the target system is overwritten.

Windows Installer checks only for the existence of the component's key file when determining if it should install the component. If the component's key file does not exist on the target system, Windows Installer will install the component as if the Never Overwrite property were set to No.