There will be just one update on Microsoft's Patch Tuesday, tomorrow.

The patch covers a critical flaw in Windows operating system, according to the software giant. It provided no other details but did note it would require users to restart their computers and will be detectable using Microsoft's Baseline Security Analyser.

Microsoft releases most security patches on the second Tuesday of each month, a date that has come to be known as "Patch Tuesday" by security professionals. This month's update looks to be a much simpler affair for Windows administrators than October's when it released a total of nine patches.