Why does VS 2008 sp1 install abort on Win7 RC?

What can you do if you get the following error when installing Visual Studio 2008 sp1 in Windows 7 RC?

Operation Aborted

From stackoverflow

• while installing Visual Studio 2008 SP1 on Windows 7 RC 7100, run this as administrator:

  reg delete HKLM\SOFTWARE\Microsoft\SQMClient\Windows\DisabledSessions /va /f
  

  Afterwards Visual Studio 2008 SP1 will install correctly.

  I copied this from the original question, just to make it a proper question/answer... marked as community wiki

• Download this update and install it before you install sp1 on to visual studio 08