WPKG is an automated software deployment, upgrade and removal program for Windows.

It can be used to push/pull software packages, such as Service Packs, hotfixes, or program installations from a central server (for example, Samba or Active Directory) to a number of workstations.

It can run as a service to install software in the background, without user interaction.

It can install MSI, InstallShield, PackagefortheWeb etc. packages, and all other packages using repackaging or some batch scripting.