I've looked everywhere and I still can't find any help regarding this problem. My system is telling me that it's already installed but when I click on the Yahoo msg icon, it blinks on then shuts off. The "off" smiley stays on my taskbar but when I move the cursor over it, it disappears. I've tried un-installing it then doing a re-install, but that doesn't help. I'm at my wit's end and unfortunately not very tech savy so if someone can help and keep it simple for an old dinosaur like me to understand I'd appreciate it very much.