Please try the suggestions in Crash, exit or high CPU when viewing certain directories to see if it can be narrowed down to a particular plugin or shell extension, and/or particular files.
If you want, and you can reproduce the problem in a directory that only contains a few files, you can send me the files and I'll see if the problem happens on my machine. If it does then it should be easy to fix, but if it doesn't then it may be because the problem is in a 3rd party plugin/extension. The guide has suggestions on tracking those down, if needed.