We actually haven't changed anything in this regard.  InstallUtil is a .NET application that is used by MSI to launch installer programs.  The installation has a .NET Installer program that runs to install the databases an structures.  I have seen this in the field before in some of the following scenarios:

• Corrupt .NET installation
• Corrupt WMI installation (rare and most fatal)
• Insufficient permissions
• Corrupt MSI installation

The problem that you are running into isn't specific to the SF install but rather the InstallUtil.exe program that is used to launch the installer.  You might try uninstalling SF altogether and try again....but more than likely you will have the same results.

Be sure that you  have admin permissions when installing as well.  If the install fails after a complete SF uninstall and re-install, then you can start weeding through some of the other items I mentioned.

Note: The most likely culprit is a .NET framework issue.  This is also the most elusive.  Other things (including VS) will appear to work, yet there is a core framework install issue.  I have seen this a number of times...and it is always a little tricky getting it back together as well.  Automatic Updates are a very common cause of this issue...we see it often.

That's using VS 2005 and 2008. The last error occured during the installation of the strataframe database.

I am getting an error installing the latest version. It seems that the first installation failed with an Add-In-manager error similar the the "80070002" experienced by someone else. Then I tried to reinstall the version and got a .Net Framework Installation Utility error with the following error

EventType : clr20r3     P1 : installutil.exe     P2 : 2.0.50727.1433    
P3 : 471ebfbb     P4 : mscorlib     P5 : 2.0.0.0     P6 : 471ebc5b     P7 : 1295
P8 : 14     P9 : system.io.filenotfoundexception 

Everthing is stuck now?