I've read the other posts but a solution isn't jumping out at me. I have win98 machine (stop laughing!). Upon startup completion, if I move the mouse over a tray icon, I receive the error and must reboot/shut down. I can run in safe mode fine. I can also run in normal mode while running in diagnostic mode. I've defragged. I've removed 'stuff' off my drive. I've eliminated some, not all, programs from quick launch tray at startup. Any help would be appreciated. Thanks, Neil.