187
Microsoft to kill off third-party printer drivers in Windows
(www.theregister.com)
This is a most excellent place for technology news and articles.
So Microsoft is no longer sending third party printer drivers thru Windows Update. You'll have to download the drivers yourself from the manufacturer, or hope the printer supports PCL/PS generic drivers (which they all should, but often don't).
If your first response is "but Linux", remember that PCL, PS and TXT drivers are the majority of printer support in Linux, seconded by the HPLIP driver.