My CS5 was working fine yesterday. Today, it abruptly stopped (error message states photoshop stopped working and must shut down.) I reopened both times and same thing happened.
FAQ: What information should I provide when asking a question on this forum?
>error message states photoshop stopped working
Since this is the Premiere Pro forum, you might ask at http://forums.adobe.com/community/photoshop
[moved to photoshop forum]
Since it suddenly stopped working I would reset preferences. Start PS and immediately hold down ctrl alt shift keys (cmd option shift on Mac) and if fast enough you will get a reset window.