To uninstall Parallels you use the 'Uninstall Parallels Desktop.app' that comes in Parallels .dmg, it's not enough to move the .app to the trash since there are other files Parallels installs in the system (.kexts in /System/Library/Extensions for instance) hence the uninstall .app is needed. Considering you already dragged it to the trash against better judgement (you seem to be a bit hasty, you already managed to install v4 by accident...), I suggest you use the uninstall .app (from the v4 .dmg) to remove the rest, if that doesn't work install v4 again and use the uninstall .app to remove it completely.
AppCleaner is not smart enough to detect the .kexts.
Last edited: Nov 16, 2008