When trying to install Visual Studio 2010 SP1, I get the error:
The feature you are trying to use is on a network resource that is unavailable.
It has to do with RiaServices.msi. Here's the log: http://www.yourfilelink.com/get.php?fid=636068
That method downloads the files to a temporary area on your hard disk from over the web. The chances are good that one of Microsoft's servers is having trouble sending you the resources required for the install. Try the ISO install method. This way you can rule out the network congestion as an issue. VS 2010
Win7 has ISO moint tools build in or you can use (my fav) elby soft cloneDVD
FYI, RIA is most likely referring to Rich Internet Applications - the 'web install' method - this can't find the resource it needs.