I'm running Windows XP Professional. Somehow, it seems in the past three days my "Alt-Tab" functionality has went down the toilet. To get it to work, I have to push Control and the Start button beforehand, and it's rare that it even works then. I've been running this build for four months. There have been on software changes in the past month excluding the installation of the new Trillian 3.1 over Trillian 3.0 about three days ago. I checked through its settings and can't see why it would cause the problem. I also checked all of the processes in Task Manager and they all check out as safe and required according to Google websites. Please, if you have any idea, I'm addicted to ALT-TAB as I use it all of the time on Linux, and without it I'm lost. Thanks in advance.