Error: EventType clr20r3 (or similar) when installing or opening TurboTax
Updated: 11/18/2011
Article ID: SLN12429
TurboTax installer has encountered a problem and needs to close. EventType: clr20r3 can occur during installation or when opening TurboTax.
The code might vary slightly, for example clr20r3t1.
These types of errors are usually caused by damaged Microsoft .NET Framework files.Solution
To resolve this, try repairing and/or reinstalling the .NET Framework.

