Windows

It could be caused by a mis-behaving shell extension. Try using ShellExView to disable all shell extensions that are displayed in a light shade of red and then, if the problem goes away, enable a few at a time until you find the culprit.

http://www.nirsoft.net/utils/shexview.html

What is the problem. Be specific. Give more details. How can one give resolutions without knowing the problem properly???!!!