I really hate applications doing thing on my back.

That is why I rename %ProgramFiles%\Common Files\Real\Update_OB\realsched.exe to realsched.exe.bak.

And I just find out something called jusched.exe is running on my back.

tlist shows it is from Sun's latest Java.

C:temp>tlist -c |findstr /sip jusched.exe
 760 jusched.exe       OleMainThreadWndName
     Command Line: "C:\Program Files\Java\j2re1.4.2_03\bin\jusched.exe"

Sun, please, at least inform me that this thing will be running on my back.

And worse yet, Sun's java command line tools do not have any version info. You can't tell what that thing does from the file.

Open regedit, go to HKLM\Software\Microsoft\Windows\CurrentVersion\Run. Ok, here you go, SunJavaUpdateSched. Sorry, I don't need you. Delete, yes, gone.