It should be copied in the "system" and "system32" folder. If that doesn't help, try also to rename the folder "Ahead" to "--Ahead". It can be found in "C:\Programme\Gemeinsame Dateien\Ahead" or "C:\Program Files\Common Files\Ahead".
(If it doesn't help, you can rename the folder back to the original name). All this might not work anymore with Windows Vista...