3.3. Windows Server Update Services
Operating systems and applications are never released in a perfect state. Even after extensive testing, bugs and flaws appear that need to be corrected before the next version. Updates come in the form of patches.
Windows Server Update Services (WSUS) provides an automated method for an organization to manage patches. Instead of servers and clients receiving patches from the Microsoft Update site, you can use WSUS to control which patches are deployed to clients.
Windows Server Update Services started as Software Update Services (SUS), which provided only operating system updates and patches. With the release of WSUS 2.0, the name was changed from Software to Server and significantly expanded updates ...