"Registry Defragmentation" supports command line switches with which you can perform a registry defragmentation, without user interaction. The syntax for the "Registry Defragmentation" command line is:
RegDefrag
[/clear] [/close] [/ejectcd] [/high_priority] [/minimize] [/noreboot_promt] [/noreboot] [/shutdown] [/nowarning] [/start]
(Switches in brackets are optional.)
Description of the command line switches:
/clear
Remove temp files when done
/close
Close "Registry Defragmentation" after defragmentation
/ejectcd
Eject CD before the computer is rebooted
/high_priority
Set RegDefrag priority to high (this will slow down other active applications)
/minimize
Start RegDefrag in minimized mode
/noreboot
Doesn't reboot computer
/noreboot_promt
Reboot computer without a promt
/shutdown
Shutdown computer
/nowarning
Don't show warnings
/start
Automatically start defragmentation process when program is started