I have recently posted a similar thread but i wasn't specific enough so i thought i should post it again but properly.
I have vista and If i go to My Documents or to any of my external drives and move files or cut/copy and paste i get the message 'Windows explorer has stopped working' and they close down.
However, this does not happen on my desktop OR whenever i go to My Documents/External hard drives via another program, for example Nero/Nero vision/make DVD/import files and then i can move/cut/copy as freely as i wish.
Please, please can someone help me with this as it is incredibly frustrating.
A couple of things for you try in diagnosing the cause of your problem:
1) Go into Vista's Safe Mode. Does Explorer crash in the same way or does it allow you to copy 'n' paste normally?
2) Back in Normal mode, open Event Viewer. If you don't know how to get to it then click the Start button, type event and it should appear at the top of the list.
Top-left of Event Viewer, go to Windows Logs -> System. In the top centre pane, look for any errors that relate to those Explorer crashes. When you find one, double-click on the entry to view the results in a new window. Use the "Copy" button that's there and paste the info here.
If you don't find anything in the System section then try "Applications" instead.