Just a note about the November CTP that appeared on MSDN Subscriber 
  Downloads late last week…
This is not the promised CTP for Visual Studio Team 
  System. That will be available for download as the December CTP sometime 
  before Christmas (knock on wood).                          
The November CTP is as described on the download 
  page (take note of the Note):              
This CTP release is intended to give you an early look at Visual Studio 2005 Standard Edition and an updated build of Visual SourceSafe 2005 [emphasis mine]. These builds are 
    not for everyone. Because our goal is to offer these builds as they are 
    ready, very little stabilization occurs so quality is variable. 
To install the products, please run setup.exe from 
    the product directory.
NOTE: Due to a known 
    issue with this build of Visual Studio, you must select the default install 
    options. If any of the default options are unselected, setup will 
    fail.
What’s a CTP? See this post (      Team System Community Technology Previews 
  (CTPs)     ).