Windows as a Service. That was one of Microsoft's battle cries for Windows 10. In a nutshell, it compared Windows to web services, like web apps and cloud services, whose software get updated behind the scenes in a rolling basis. Now it is bringing that same paradigm to Windows 10's immediate predecessors, Windows 7 SP1 and Windows 8.1, with monthly rollup and security-only updates. This new system, promises Microsoft, will ensure higher quality patches and a more consistent update experience for users.