Provo, Utah--Software company Novell Inc. has hired J. Walter Thompson Co., New York, to provide advertising, creative development and media placement. Novell initiated a review because of a change in its business direction following its acquisition of Cambridge Technology partners last year and SilverStream Software in July. Novell said it needed new, innovative marketing to reflect its change from a network infrastructure provider to a leader in Web-based business solutions and application development. Novell's previous agency was SicolaMartin, Austin, Texas. Billings were undisclosed.