i jus need some idea abt how to start - remote login. its may be any platform (windows,linux,unix,etc..) . but i need to run a java program as a service immediately when the system boots up.And only after answering that program (like a loggin screen), i should be able to access the system. is that possible,pls gimme an idea rather than the actual code. coz i jus wanna learn it myself. if it seems very cumbersome to explain, no probs it a code.