I've run into the same problem.

In my case, the problem was caused by a single short cut on a desktop. When I removed that shortcut and re-created it, the problem has completely gone!!

The shortcut was ok for a very long time, so I don't know the exact reason why it suddenly caused the problem. But anyway it was solved for me.

How to find the bad shortcut:
1) put everything (except My Computer, My Documents etc) on the desktop into a new folder.
2) open that folder in a small window and scroll within it. When the bad shortcut appears in the window, the explorer.exe immediately crashes.
3) remove that shortcut.