.NET Framework 2.0 :: CLR Error: 80004005

Symptom: When you launch application then the following error message appears:

This problem is likely caused by the presence of two different versions of Microsoft .NET Framework 2.0 on the machine -- e.g. a pre-release or beta version and the final RTM version. The solution is to uninstall both and then reinstall the RTM version (v2.0.50727).

Here are the steps...

1. Uninstall Microsoft .NET Framework 2.0 from Add/Remove programs.

2. Use this automated clean-up tool to remove Microsoft .NET Framework 2.0.

3. Reinstall Microsoft .NET Framework 2.0. Here is the official link -- it requires downloading a large executable (dotnetfx.exe) and then running it to install the framework: http://www.microsoft.com/downloads/details.aspx?FamilyID=0856EACB-4362-4B0D-8EDD-AAB15C5E04F5&displaylang=en Also, here's a link that describes how to figure-out which version of .NET is currently installed: http://support.microsoft.com/kb/318785 For example, on a test machine we have a folder entitled C:\WINDOWS\Microsoft.NET\Framework and there are 3 subdirectories: v1.0.3705 v1.1.4322 v2.0.50727 So, we know that particular machine has .NET v1.0, v1.1 and v2.0 installed.