You need to remove the most recent Microsoft update from the computers

All client computers in your company network have Windows 7 Professional installed. The
computers are configured with automatic scheduled Microsoft updates installation.
You receive a support call indicating that after the recently installed update, one of the business
applications is unable to start on the computers.
You need to remove the most recent Microsoft update from the computers.
What should you do first?

A.
From the Programs and Features, open the Installed Updates window.

B.
From the Services console, open the Windows Update service.

C.
From the Event Viewer, open the System log.

D.
From the Task Scheduler, view the WindowsBackup node.