Giz - it looks like something 'reserved' Desktop space. wrote it to the registry and won't let go of it, even if you're not running it. It would have to be a bar of sorts (and not necessarily one of Stardock's), so start with them. Start everything like that that you have on your 'puter, particularly SysMetrix, one at a time and see if anything you have takes that space up or shows an enabled 'Reserve Space' option. If you in fact find one, then un-install it and see if it fixes it.