The Commit Window shows the progress of an installation, upgrade or removal of a package and it's dependencies.
It displays a message of what stage in the process it is in and a progress bar to show how far through the operation it is.
If the operation completes successfully. Click on the button to dismiss it.
If new packages have been added to the your list of packages the "What's New..." button will be enabled. This button will open a Main Window with the filter set to "What's new".
If the one or more upgrades to already installed packages are detected in the new lists the Upgrade All button will be enabled that leads to the Configure Package Window where all the upgrades available will have been added so they can easily all be applied at once.
If the operation fails an error window will be shown with the cause of the failure.
If the failure is caused because there are already files in the location it would like to install files in one of the installed packages the Conflict Manager Window showing information on the conflicting files will be shown instead.