Ok guys, description first then the problem
Dell Inspiron 1521. AMD Turion 64x2. Running Vista with SP1. Two users.

Admin user....In Computer page rght click of mouse or pad on any icon causes Explorer to stop working and windows checks for a solution, as yet none found. Right click works in all other pages.
Other user.... Right click works fine in all pages and app's
Dell diagnostic test's show no problems with hardware
I could live with it, but can't just right click and clean disc or find and fix file errors or defrag as and when with out logging off and opening other user
Any suggestions?
Douglas