Vista - cannot alt-tab out of game

i can't alt-tab out of a steam game, counter-strike. it's never done this before, and i'm trying to think of what i may have done for this to occur, but nothing comes to me. the only thing i can do to get out of the game is by quitting the game itself, or ctrl-alt-del to task manager. when i go to task manager, it says that the "aero" theme of vista isn't compatible with the game. like i said, it's never had this problem before. any help is greatly appreciated.

try ALT-ESC

Not sure what the problem is, but you could try using the windows key to get out of it.

alt-esc does the same thing as the rest. whenever i try to goto windows desktop, it brings up a black blank screen, making me have to ctrl-alt-del into task manager.

bump. still having the problem. it has nothing to do with what i press btw. something conflicting with hl.exe (counterstrike) and vista's aero theme.