If you are certain the problem is in Yahoo, then you may want to uninstall it, then re-install it. It may work, then again it may not. I'm doubting there is a program conflict but it's possible. I'm using yahoo messenger and outlook express for my mail and messenger service and I'm not having any trouble. It's easy enough to download Yahoo again and not have any trouble with a new install. Also check the apps in your background and make sure you aren't having an application running 2 and 3 times when you only need one of them. The Ypager (Yahoo pager) is notorious for this.