I've noticed the past week, there is an area on my screen that is unclickable.

For instance, I'm working with SQL in Access 2007.  An error message pops up that tells me that I'm doing something wrong. I go to click the 'OK' button.  I can't.

I have to move the window up a little bit to click the button.

At the moment, it's around 45% from the top of my screen and seems to vary a little, It was once around 75% and only went from the left side to about 1/5th of the screen width, it's weird. I click on the area, and the taskbar button stays pressed, and the window appears to be deactivated.

4-month-old Toshiba Satellite A350 with Windows Vista x64.