The .NET 2.0 Framework is required by MuvAudio2 to function properly. When installing MuvAudio2, it will detect this and give you the option to automatically download and install .NET 2.0. If you skipped this step in the installation process, you can download .NET 2.0 by clicking here. Before installing .NET 2.0, it may require you to install Windows Installer 3.1 which can be downloaded by clicking here.

If you have .NET already installed and you are still getting an error relating to the .NET Framework, you can try to repair your .NET installation by doing the following:

• Click on your "Start Menu".
• Click on "Control Panel".
• Double-click on "Add/Remove Programs" on Windows XP or "Programs and Features" on Windows Vista. 
• If "Microsoft .NET Framework 3.5 (SP1)" is listed click on it and then click on "Change/Remove" on Windows XP or "Uninstall/Change" on Windows Vista.  On the next window, make sure "Repair" is selected and click "Next".
• If "Microsoft .NET Framework 3.5 (SP1)" was not listed, and "Microsoft .NET 2.0 Framework (SP1 or SP2)" is listed click on it and then click on"Change/Remove" on Windows XP or "Uninstall/Change" on Windows Vista.  On the next window, make sure "Repair" is selected and click "Next".
• This should repair your installation of the .NET Framework.