This is our second computer to have this problem--not earth-shattering, but annoying. We gave up on the first computer, but it happened again to the second one this a.m., and it is really annoying. Was on a web page using Firefox when it locked up. After doing Control-alt-delete, the desktop came back with all the icons hightlighted. Nothing seems to get them back to normal. I opened a new guest account and the icons are normal, so I know something changed the settings on the administrator account, but I would like to get the default back.