I suggest you troubleshoot in Clean Boot Mode.
Perform a clean startup to determine whether background programs are interfering with your game or program
http://support.microsoft.com/kb/929135
If the issue occurs in Clean Boot Mode, you may use ShellExView.
http://www.snapfiles.com/get/shellexview.html
Important Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Run ShellExView, in the pane sort the entries with manufacturers. Disable all non-Microsoft *.dll files, and check the result. If the issue does not occur, one of the files can be the culprit. We could narrow down it one by one.
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