[this_is_gav]

Another JKDefrag vote. JKDefragGUI isn't needed - it's a separate front-end which downloads the latest JKDefrag and then allows you to set options for it via a GUI rather than through a command line. The standard JKDefrag has got a GUI, but no configurable options through it - any options you want set need to be done through the command line.

Get JKDefragGUI. The default options are fine, but it lets you set an option if you do want to. No needless background services, no silly startup processes. It's just a defragger.