title: Visual Studio 2010 not recognizing .NET Framework 4.0
body: <p>I've recently had to uninstall/re-install my .NET Framework 4 after finding my current installation was corrupt. I found this when attempting to upgrade my Telerik Controls.</p>
  
  <p>I manually uninstalled my .NET Framework using the command line and then re-installed the newest version of the framework from MSDN.</p>
  
  <p>Now when I open previous projects in VS2010 (which are coded in .NET 4), it prompts me to Install .NET Framework 4.0 or retarget the Project to a another Framework or Profile.</p>
  
  <p>Is there a way to refresh Visual Studio 2010 to recognize that I have the .NET Framework installed? and/or would a simple Repair on my Visual Studio installation correct this problem?</p>