Window World Complaints: Window World was founded in 1995 by Leon Whitworth in Wilmington, NC. Now it is one of the largest companies in America offering home improvement products. It also specializes in exterior building goods. The company is aimed at manufacturing, sales and installment of vinyl doors and windows. Among the other products provided by the firm are textured coatings, eave and overhead systems, patio shades and covers, vinyl sidings, custom shutters and entry door systems. Modern technologies and high quality materials are used.