To manually remove Batman with the Registry Editor follow the steps listed below.

Please be aware if the Registry Editor is used incorrectly, you may cause serious problems that may require you to reinstall your operating system.

- Select the  “Start” menu and go to the run menu text field (start search)

- Type “regedit” to open the registry editor.

- Delete the following 3 folders only.

-  

Batman: Arkham Asylum  that can be found in the file structure:

HKEY_LOCAL_MACHINE / SOFTWARE / Eidos Interactive Limited / Batman: Arkham Asylum
               

Batman Arkham Asylum that can be found in the file structure:

 HKEY_LOCAL_MACHINE / SOFTWARE / RocksteadyLtd / Batman Arkham Asylum

{4E79A60F-15D2-4BEC-91AD-E41EC42E61B0} that can be found in the file structure:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{4E79A60F-15D2-4BEC-91AD-E41EC42E61B0}

- Exit the Regedit program and reboot your machine.

- Insert the  Batman: Arkham Asylum DVD-ROM if autorun is not enabled select “autorun.exe” on the disc directory.

- Press “Install game” (This will then take you through the uninstall game process).

- Press “Install game” again to reinstall the game.