Sorry for my english, i'm french !!!
I'm administrator and I use GPO to install adobe Reader.
On alls machines i have install by GPO the version 9.30, with with file msi, that i have find on FTp Adobe.
I want to install 9.31 but i find on ftp only file Msp.
So i use msp with the command msiexec /a fichier msi /p fichier msp for construct file msi to install 9.31.
But when i execute the file i obtain a message that say : Another version of this product is already installed...
I don't want ti uninstall the version 9.30 before install 9.31.
I don't resolve this problem.You can help mee.
Would you try msiexec /p "path to MSP"?