I’ve been trying to get VS2010 SP1 to upgrade Visual Studio 2010 Professional for seemingly hours now, and I finally hit a breakthrough without having to reformat my machine (my preferred method of fixing software problems). When I had initially installed VS2010, I had let it install ‘everything’… i.e. support for C++, C#, F#, Web Development, etc. all out of the box. After uninstalling and reinstalling VS and minor VS SP1 cruft numerous times in an all out “bang-your-head-against-the-wall” method, I finally use the installer for VS2010 to reconfigure my installation and remove the components I wasn’t using – namely F# and C++ support. As I plan to use this installation for web development, the lack of C++ really isn’t much of a problem for me.

It was a shot in the dark, but it worked. I was able to install SP1 from here: Visual Studio 2010 SP1 Web Downloader

Finally, I get to move onto installing Lightswitch to find out what it’s all about!