Steve Ballmer said in an interview that he believes that Linux infringes on Microsoft's intellectual property:
In a question-and-answer session after his keynote speech at the Professional Association for SQL Server (PASS) conference in Seattle, Ballmer said Microsoft was motivated to sign a deal with SUSE Linux distributor Novell earlier this month because Linux "uses our intellectual property" and Microsoft wanted to "get the appropriate economic return for our shareholders from our innovation."
The Nov. 2 deal involves an agreement by Novell and Microsoft to boost the interoperability of their competing software products. It also calls for Microsoft to pay Novell US$440 million for coupons entitling users to a year's worth of maintenance and support on SUSE Linux to its customers. In addition, Microsoft agreed to recommend SUSE software for Windows users looking to use Linux as well.