Error al instalar el .NET Framework 2.0

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You can also try to use the following steps to get the machine back into a known state and then install things back one by one:

1. Download the .NET Framework cleanup tool and choose to cleanup the version of the .NET Framework that is causing problems on your system
2. Download and install the version of the .NET Framework that you cleaned up in step 1 (such as the .NET Framework 1.0, .NET Framework 1.1 or .NET Framework 2.0)
3. (optional) Download and run the .NET Framework verification tool to double-check that all .NET Framework files are correctly installed
4. Download and install the desired .NET Framework service pack (such as .NET Framework 1.0 SP3 or .NET Framework 1.1 SP1) by running the setup package directly instead of using Windows Update. Running it directly will allow the service pack setup to display error dialogs instead of having Windows Update suppress them

Running these steps should ideally put your machine back into a known good state with the .NET Framework plus a service pack installed. For more details, please visit What to do if other .NET Framework setup troubleshooting steps do not help.

Referencia
http://forums.microsoft.com/MSDN/Sho...69132&SiteID=1

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