Thanks for posting. From your post, my understanding of the two issues is
1) ALT+tab doesn't work.
2) The behavior of ALT+F4 is unexpected.
I cannot address the first issue. I suggest contacting your hardware
manufacturer for assistance.
I might be able to help you with the second issue. The ALT+F4 keyboard
shortcut can either close the active item, or exit the active program. This
keyboard shortcut doesn't minimize windows as you expect it to.
For more information about keyboard shortcuts, see the following Windows
Help and How-to webpage: http://windowshelp.microsoft.com/Win...dc5661033.mspx
As another community member already stated, depending on which edition of
Windows Vista you are running, you might be able to use Flip-3D. For more
information about this feature, see the following Windows Help and How-to
Please let me know if I can provide further assistance on this problem.