To repair this problem�I ran a full silent repair of the .NET Framework 4.0.���Here’s how on either a 32 bit or 64 bit computer:

  1. Click Start -> All Programs -> Accessories -> Run
  2. In the Open textbox paste in the following line (see list of all .NET Framework version�install, repair and unistall�command lines�here):For silent repair on 32 bit computer with .Net Framework version 4.0.30319 use: 
    </p><pre>%windir%\Microsoft.NET\Framework\v4.0.30319\SetupCache\Client\setup.exe /repair /x86 /x64 /ia64 /parameterfolder Client /q /norestart</pre><p>

    For silent repair on�64 bit computer�with .Net Framework version 4.0.30319 use:

    </p><p>%windir%\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\setup.exe /repair /x86 /x64 /ia64 /parameterfolder Client /q /norestart</p><p>
  3. Click OK to start the repair
  4. After, the repair ran for a few minutes, I restarted IIS 7.5, and things began to work correctly!