When this happens to me it is usually because I have many applications open and if Photoshop is one of them, many photos open. Ultimately it is due to too little available memory. To fix it, I have had to reboot. My PC is three years old but has a Gig of memmory. So I have to have a LOT of stuff going on. If you have less memory, maybe less would have to be going on.
Maybe this isn't what's happening to you but it could be. Hope you figure it out. |