"We are now looking at the best way to clarify WU's behavior to customers so that they can more clearly understand how WU works," he added at the time.

Enterprise that rely on WSUS servers to get patches and hotfixes to users will also be affected by the WU software update, noted another Microsoft manager.

"WSUS-managed end-user[s] who navigate to WU to perform an interactive sync will receive an updated version of WUA [Windows User Agent] as this new agent is rolled out over the next few months," said Marc Shepard, a program manager with the WSUS group, in a separate post on Monday. "Machines whose end-users don't explicitly navigate to WUA to perform an interactive scan will continue to use the existing version of WUA. This will result in a mixture of WUA versions in most corporate environments."

Shepard said that the mix shouldn't matter, since the new version of WGA, the WU client software, is backwards compatible, and will continue to connect with WSUS servers.