VS2010 shows error Message when editing

Any editing on for the first time after starting VS2010 gives exception message

Visual Studio has encountered an exception. This may be caused by an extension. You can get more information by running the application together with the /log parameter on the command line, and then examining the file 'C:\Users\USERNAME\AppData\Roaming\Microsoft\VisualStudio\10.0\ActivityLog.xml'

Solution:
          It appears to be due to missing registry information. Adding the default value to the below registry key solved the problem.

On 32-Bit Windows: [HKEY_CLASSES_ROOT\CLSID\{73B7DC00-F498-4ABD-AB79-D07AFD52F395}\InProcServer32]
On 64-Bit Windows: [HKEY_CLASSES_ROOT\Wow6432Node\CLSID\{73B7DC00-F498-4ABD-AB79-D07AFD52F395}\InProcServer32]

The "(Default)" value should be one of the following:
On 32-Bit Windows: "C:\Program Files\Common Files\Microsoft Shared\MSEnv\TextMgrP.dll"
On 64-Bit Windows: "C:\Program Files (x86)\Common Files\Microsoft Shared\MSEnv\TextMgrP.dll"