Microsoft has begun pushing out Windows Internet Explorer 8 via Windows Server Update Services, as it announced back in June that it would start doing. The package is published as an update rollup, so WSUS administrators who have their systems set to automatically approve such packages will want to be careful after synchronizing if they’re not ready for a full IE8 deployment.
Only systems with Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008 will be able to upgrade to Internet Explorer 8. Systems still running Windows 2000 will be stuck on Internet Explorer 6.
Internet Explorer 8 was released to the general public in March 2009.