Quite apart from ignoring their own End User License Agreements, it now appears that Microsoft doesn’t understand the concepts of A/B testing and “phased deployment”. One user reported that:

Window Server Update Services forced Windows Desktop Services 3.01 on the fleet of machines even though admins had configured their system to install updates only for existing programs and the search program wasn’t installed on any machines (well, until then, anyway).

Of course, Microsoft’s EULAs are written so broadly that it is probably quite legal for them to trash your system by mistake.