This file is a harmful and undesirable program. Probably virus. It's recommended to delete it.
What is j.exe Windows startup process
File name: j.exe
Program name: j.exe
Description: Unknown malware.
Information added by: QRob001 at 14 August 2008
Hint: If j.exe file is a virus or trojan, we recommend to use a antivirus software or registry cleaner.