Microsoft have issued a cumulative security update for Internet Explorer. The update is not for Windows 9x machines (a update will follow eventually). It patches 8 security holes some of which are labelled as critical. Full details are in Microsoft security bulletin MS04-038. Some of the security issues will already have been patched on many computers, for example Windows XP SP2 users will only be at risk from 1 of the security issues.

The update should be available via one of the links in the security bulletin or alternatively via Windows update.