i already tried this:
Start > Run > type regedit and press enter
If there is an entry in there with the name DivX in it, delete it.
Now navigate to:
Delete the value (default). It will then appear as an empty value.
Close the registry editor and reboot your computer
there are no DiX entry on the HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers
& i can't delete the default on this one: HKEY_CLASSES_ROOT\SystemFileAssociations\.avi\shellex\PropertyHandler\