The Microsoft Update Catalog is a service from Microsoft that provides a listing of updates that can be distributed over a corporate network. You can use it as a one-stop location for finding Microsoft software updates, drivers, and hotfixes.
The Microsoft Update Catalog lets you search on a variety of update fields and categories. These include the update title, description, applicable products, classifications, and knowledge base articles (e.g. KB9123456). When searching for hardware updates ("drivers"), you can also search for driver model, manufacturer, class, or a 4-part hardware id (e.g "PCI\VEN_14E4&DEV_1677&SUBSYS_01AD1028"). You can narrow the scope of your search by adding additional search terms.