Looks like some resourceful users have found a fix:
Neowin.net said:"While Microsoft has not offered up any reasoning for this issue -- or more importantly a fix, it seems that some users who are experiencing the issue might have found one. According to user Step_001 in the Microsoft Support forums, they say that the problem is being caused by the Windows Installer Module, and the Windows Installer Module Worker. These processes will randomly start running in the background and when they do, they seem to use a huge amount CPU processing power and memory usage. Because of this, it causes the Pro 3 to overheat or have the fans spin up to annoying levels."