>>Did you also remove Silverlight 3.0 or did you let that stay?
>>Cecil
>
>I did not remove it.
>
>>
>>>>Has anyone here on Universal Thread had Visual Studio 2010 RC1 installed on their desktop or laptop and now installed Visual Studio 2010 (final release)? I am making an assumption that it is best to carefully remove all parts of Visual Studio 2010 RC1 before attempting to install the final release?
>>
>>>That's what I did. I removed anything related to VS2010 out of add/remove programs (or whatever it is called on here) prior to installing the released version. No problems installing.

VS 2010 Final release installation prompts (i.e., forces) you to uninstall 2010 RC1 as part of the installation process. Silverlight 3 should coexist fine with SL 4.