Group Policy has two Software Settings nodes.
\Computer Configuration\Software Settings\ is for software settings applying to all users who log on to the computer. This node has a Software Installation subnode, and possibly other subnodes placed there by Independent Software Vendors.
\User Configuration\Software Settings is for software settings that applying to users regardless of which computer they log on to. This node has a Software Installation subnode, and possibly other subnodes placed there by Independent Software Vendors.
See also: