I need to download .NET3.5 SP1 for TurboTax. When attempting to load the software I was led to issues that said .NET2 was not working properly. I have deleted the file and am trying to reintall .NET2 however I am receiving an error message that windows installer service is not properly registered and will not let the install complete. How do I register WIS? I have also had intermitent messages saying that setup.exe was running in another program although I was not running another program. Is this somehow related?