how to uninstall CorePNG properly?

there is no entry in the "Add/Remove Programs" dialog, tried in "Control Panel -> Sound and Audio Devices Properties -> Hardware -> Video Codecs" too, but that doesn't make any sense, it's still there when i open it again. someone help :(

Why uninstalling it?

Try deleting: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Drivers32\vidc.PNG1 HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Drivers32\vidc.PNG1 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources\icm\vidc.PNG1 and from system.ini drivers32 vidc.PNG1