We can, however, show that it does. And somewhat disingenuously, if I may. You see, Microsoft is a major player in the Business Software Alliance, along with Apple and 27 other companies. And the BSA supports SOPA. This is from a recent BSA bulletin:
The Business Software Alliance today commended House Judiciary Committee Chairman Lamar Smith (R-Texas) for introducing the “Stop Online Piracy Act” (H.R. 3261) to curb the growing rash of software piracy and other forms of intellectual property theft that are being perpetrated by illicit websites.