Error 1937 when Installing Office 2007

We were installing Office 2007 on a Vista Laptop when we got a stop error 1937 with something similar to "The signature or catalog could not be verified or is not valid" as part of the message. It turns out that before installing Office 2007, one should have the Microsoft .net Framework installed.

Microsoft .net Framework 1.1

Microsoft .net Framework 2.0

Microsoft .net Framework 3.0

A few notes:

• I would install all the frameworks concurrently (i.e. 1.1, then 2.0, then 3.0)
  
• For us, the error went away after installing the 3.0 Framework, and Office 2007 installed
• This error seems to happen in other instances of installations, like Visual Studio: MS Forums
• I think the bottom line is, if you get a nondescript error message while installing a Microsoft product, download the .net frameworks