You have not provided any system or other details like what actions, so nobody can help you.
PSCS 6, 64 bit version, Win 7 64, a self recorded action.
Post the Action perhaps its doing something the is causing the focus switch there may be some other way to do what the action is doing using some other steps the will not cause the focus switch. Also have you tried minimizing Photoshop while the batch process is running.
Thank you so much for your answer, JJMack.
1. If I´m running the .atn file, PS doesn´t allow to minimize the window; it doesn´t allow anything.
Changeing to another programm means I have to start this, or to maximize an other window.
But then PS wilderly changeing to his own window and back to the window before.
2. How can I upload a file here?