Whenever I launch GE: Source, I see the Steam box telling me that Steam is preparing to launch the game and then a brief flash of white followed by nothing - nothing opens at all.
I've tried many things, including verifying the cache, running in compatibility mode, and even deleting the media file (I got past the Valve and "Powered by Source" opening, but it still closes). When it "crashes", i don't get anything telling me that hl2.exe has stopped working or anything like that. It just closes.
Any help would be appreciated.