Have tried a repair Rich thanx to no avail.
Sadly the problem arises also when I try to copy a folder from another drive - That folder contains subfolders too.
It also arises when I try to create a new menu item in the Start Menu (ie. to set up a 'directory' called Microsoft so that I can put all my items/shortcuts into it like Word, Excel, Powerpoint etc)
Tis really driving me crazy now as I can't organise my drives or pics from the race meetings etc as I can't do anything that involves renaming or deleting directories....

