I am having this too. I can move the mouse to other programs on my task bar but the clicks are unresponsive. When this happens, I can also not move the task bar.

I get get around the unresponsive taskbar by
1) Using ALT + Tab to move between programs.
2) Using Ctrl + ALT + Delete to start up the Task Manager, after which the task bar becomes responsive again.

But then after a while the task manager becomes unresponsive again.

I have checked for viruses but apparently there are none in my system (according to more than one program) but perhaps it is a hidden virus.

I have used the task manager & services console to turn off as many services as I could. I have not located the service/program that is causing the problem. I am glad that I have been able to delete some unwanted services, but at the same time I do not want to delete too many.

In Vista apparently there is something called GDI object leak (Graphical display objects are not mapped properly by the system, and so clicking them does not work, and microsoft has published a fix for it). There have been some updates to windows lately so there is an outside chance that it is a Windows problem.

Any help greatefully recieved.

Should I do a highjack this and send it somewhere?