My 770 is having some touch screen response issues. Some points on the screen are not responding to the touch. For example, I can click on the Web icon...but not the email or apps icon. When I open a web browser, I'm unable to click on the "X" to close the window. I'm able to get into the screen calibrating utility, which works fine. I've reinstalled the 2006 OS, but issue is still there. Really strange. Was wondering if anyone has any suggestions. Thanks!