This file is a harmful and undesirable program. Probably virus. It's recommended to delete it.
What is bat.exe Windows startup process
File name: bat.exe
Program name: type
Description: W32/Anskya-A worm.
Information added by: Supersonico at 10 July 2008
Hint: If bat.exe file is a virus or trojan, we recommend to use a antivirus software or registry cleaner.