You have a shell extension that was created by using Microsoft Foundation Class (MFC). The shell extension is hosted in Windows Explorer. When you use Explorer, the Explorer.exe process becomes unresponsive. This problem occurs when the following conditions are true:

• You do not have Microsoft Visual Studio 2008 installed on the computer.
• The shell extension was created by using Microsoft Foundation Class (MFC) in Microsoft Visual Studio 2008 Service Pack 1 (SP1) or in Microsoft Visual C++ 2008 Feature Pack.