Almost 10 years ago in October, 2003 – Patch Tuesday. Microsoft invented the process of regularly scheduled security updates on every second Tuesday of the Month. Windows 8 is expected to get four of the updates, one of them is critical and dealing with Remote Code Execution with Internet Explorer 10, while the other three updates are Important and deal with Elevation of Privilege and Denial of Service. The eight bulletins that Microsoft is releasing fixes a total of 23 different vulnerabilities in Microsoft products. Windows RT will get one Critical update affecting Internet Explorer and two Important updates.
Source: https://thehackernews.com/2013/08/Microsoft-Patch-Tuesday-Critical-vulnerabilities.html