SEATTLE (AP) - Microsoft Corp. says the executive in charge of its Windows and Web operations is leaving the company.

Kevin Johnson was president of Microsoft's platforms and services division, which was responsible for Internet Explorer, the Windows operating system and the Windows Live programs, including Web e-mail and instant messaging. The division also included online advertising, search and Microsoft's MSN sites.

Microsoft says the division will now be split in two, with heads of the Windows and online groups reporting directly to Chief Executive Steve Ballmer.