ok, this is how to completely remove DC Universe from you Computer,
First open up Starter menu, Down Bottom Left you ll see a Very Small... I mean Very small, "clickable Button (Wrench and Hammer)" that will take you to a hidden menu, 2nd from Bottom Click Uninstall, (it will load and then systematically delete contents to "Uninstall")
end of first part... Close out game completely, (use Task Manager, or just click the "X" top of the menu)
Click "Windows Button (Hold)" & "D" key simultaniously to get to Base Screen and "Right Click" DC Universe Online Short cut. then Choose, "Open File Location" normally 3rd down from List. then highlight all folders, right click highlight and Choose option "Delete".
Open Recycle Bin, and Empty Recycle Bin to Delete Contents...
end of part 2,
Part 3, - Uninstall as normal through Program file Uninstaller... Done... completely gone from your Software. Done!