How to hide or show icons on desktop xp

right click > arrange by > show desktop icons

if that doesn't do anything you icons have been deleted, check recycle bin

start > my computer > click folders button at the top of the window, look for recycle bin on the left hand side

if you can find your icons there, select them and click restore, if not, then they have been deleted permanently

try system restore: start > all programs > accessories > system tools > system restore

if there's a date available a week ago, try restoring to that point

if that doesn't help you will need to recreate all your icons manually