error occuring debegging visual studio 2010

For this issue, I think you could also have a try repair your Visual Studio, you could follow the procedures below,

To repair Visual Studio

1.In Control Panel, on the Programs and Features page, choose the product edition that you want to repair, and then choose Uninstall/Change.

2.In the Setup wizard, choose Repair, choose Next, and then follow the remaining instructions.

To repair Visual Studio in silent or passive modes (that is, repair from source)

1.On the computer where Visual Studio is installed, open the Windows command prompt.

2.Enter the following parameters:

 DVDRoot \vs_ProductName.exe [/norestart]

 If ERRORLEVEL 1 Echo ERRORLEVEL=%ERRORLEVEL%

hope it helps you,