Microsoft is scheduled to release two patches for its Windows operating system on Tuesday 13 December.
At least one of the patches has a security rating of 'critical' and requires a system reboot, the company said in a security bulletin on its website.
Microsoft traditionally releases its security software patches on the second Tuesday of the month. An advanced notification is sent out on the Thursday before to allow systems administrators to prepare for the forthcoming update.
In addition to the security patches, Microsoft also plans to release two high priority non-security updates for Windows and three non-security updates for Windows Server.
Tuesday will also see the release of an updated version of Microsoft's Windows Malicious Software Removal Tool.
The patch release will be followed by a webcast on Wednesday 14 December at 11am US Pacific Time (7pm BST).
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