Edelman
Microsoft uses the services of Edelman. One notable example is the laptops giveaway.
Also see Waggener Edstrom.
Waggener-Edstrom Behind the 2008 Laptop Bribes, Edelman Behind 2006’s
Edelman and Waggener Edstrom Reported to the FTC
Firms Behind Microsoft Bribes Involved in Gates Foundation PR, Prodding and Misinforming the Press
CNET Shows Anti-Google AstroTurf (‘Consumer’ ‘Watchdog’) is Connected to Edelman, “Microsoft Goes on the Offensive” Against Google
Richard Edelman — Like Richard Berman — Destroys Society for Profit
Mass Layoffs at Microsoft's PR Department (Waggener Edstrom) and Agencies That Bribe Bloggers and Journalists on Microsoft's Behalf (to Act as a Proxy, Distance the Liability)
Also see Waggener Edstrom.