I used group policy to deploy an Adobe Reader X .msi file, which successfully updated the machines it was targeted to.
The computer group those machines belong to still has a link to the GPO which deployed the .msi.
Is it the .msi file which checks the version of installed software before running a new installation, or is it another Windows or AD service?
Does the msi file remain on the computer after installation?
I ask because I am concerned that if it is the msi file which detects if the software is already installed, and if the msi file is not kept on the computer, does the msi file continue to be copied to the machine each time it restarts?