It is entirely possible that the window company can lien your home with respect to the window matter that you are writing about. However, if you are the sole person on legal title to the home where the windows were to be installed and you did not sign a contract for the windows, then there does not seem to be a legal or factual basis for any claimed lien to be placed on the home.I suggest that you consult further with an attorney that practices in the area of construction law with respect to your matter.