Menu doesn't line up on wide screen

I use my USB portable apps on two computers. One works fine. On the other, a widescreen (17") the menu doesn't line up. For example, there is a about 1 and a half inch black rim on the right and bottom sides of the menu. In addition, the bottom item, use of disk space, does not line up with the place in the menu where they belong and the "x" button doesn't work to shut down the menus. Does anyone else have this problem? Know how to fix it?