Microsoft today released set of updates for Surface Pro devices which brings in support for using Type Cover 2 or Surface Touch Cover 2 and device driver updates to optimize Surface Pro for Windows 8.1 which is getting released later this month.
October 2013 updates:
In preparation for the release of Windows 8.1, these additional updates were released for Surface Pro running Windows 8.0:
•UEFI firmware updates.
•System Aggregator firmware updates.
•Various device driver updates to enhance the Windows 8.1 update experience, and optimizations for using Type Cover 2 or Surface Touch Cover 2.
Note These updates should be applied prior to updating to Windows 8.1.