When attempting to uninstall Microsoft .NET framework version 1.1, I get
these errors:

(Application popup, event id 26)
Microsoft Visual C++ Runtime Library

Runtime Error

Program C:\Windows\System32\msiexec.exe

This application has requested the runtime to terminate in an unusual way.
Please contact the application support team for more information.


After a long pause, the second error occurs:


The Windows Installer service could not be accessed. This can occur if you
are running in safe mode or if the Windows Installer is not correctly
installed.

I have uninstalled and reinstalled Windows Installer v 3.1 (v2) twice using
both methods described in this article:

http://support.microsoft.com/default...;EN-US;Q315346

I also tried uninstalling the WI and visiting Windows update where it
automatically downloads and installs the installer. None of this has worked.
I still get both errors.

As I said, this started with trying to uninstall .NET framework1.1. I was
following the method to unistall and reinstall, described in this article.
(I skipped step 4 that required the Msizap utility included in the windows
installer SDK utility) (Did not try the repair method listed here)

http://support.microsoft.com/default...b;en-us;824643

The reason for uninstalling .NET framework1.1 is that a critical security
update (KB886903) will not install. Tried countless times even after
sucessfully uninstalling/reinstalling .NET1.1.

Have .NET 1.0, 1.1 and 2.0 installed