Try this but first create a System Restore Point. To do that go to
Start->Help and Support->Pick a task and click the link to System Restore.
Follow the wizard to Create a new restore point.
1) Go to Start -> Run -> type regedit and navigate here:
HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers (note the asterisk "*")
2) Click the the + sign next to the ContextMenuHandlers key, to expand it.
Now you will see some of the programs that have added items to your
right-click menu. Simply delete the program keys you don't want, exit the
Registry and refresh.
To remove entries from right-click menu on folders and/or drives navigate
here HKEY_CLASSES_ROOT\Folder\shellex\ContextMenuHandlers for folders -or-
here HKEY_CLASSES_ROOT\Drive\shellex\ContextMenuHandlers for drives, and
follow the same procedure as you did with files.