The first browser war ended with Internet Explorer having no remaining serious competition for its market share. This also brought an end to the rapid innovation in web browsers; until 2006 there was only one new version of Internet Explorer since version 6.0 had been released in 2001. Internet Explorer 6.0 Service Pack 1 was developed as part of Windows XP Service Pack 1 and was also integrated into Windows Server 2003. Further enhancements were made to Internet Explorer in Windows XP Service Pack 2 (released in 2004), including a pop-up blocker and stronger default security settings regarding the installation of ActiveX controls.