Multiple Desktops, Nested Array Of 'Desktop'

The problem is that he has many many desktop folders. Under his user folder he has a Desktop folder. Click on that and there's a folder called Desktop. Click on that and another. This goes on and on for perhaps 30+ times. Worse there is another called Desktop1, with a nested array of 'Desktop' folders below. Worse still Windows Vista won't let you delete any of these because their filenames are too long. It won't let you move their location either to condense/combine them for the same reason. I don't know when the problem started or why.