Microsoft released Windows 8.1 on Oct 17th, 2013. We've been testing with Windows 8.1 for several months and have not found any issues so far. However as the final release of an OS from Microsoft may be different than previous beta builds, we will spend some time qualifying the release with our line of products that are supported on Windows 8.
Windows 8.1 is qualified with PreSonus products as of November 8, 2013. For a review of what is supported on Windows 8 see the notes below.
Here's a link to the official notice of release of Windows 8.1 from Microsoft: http://www.microsoft.com/en-us/news/press/2013/oct13/10-17windows81pr.aspx
Supported in Windows 8.1:
Device driver 1.2.1 is compatible with the following devices:
StudioLive AI Series:
Universal Control AI 1.0.1 - build 24705
FireStudio™ / StudioLive™ Series
Universal Control 1.7.1 and newly posted Universal Control 1.7.2 is compatible (available as of 11/8/2013 on the download page) with the following devices:
Studio One v2 (Professional, Producer, Artist, Free and Demo) 2.6.1.
Not Supported in Windows 8 or 8.1 and later versions of Windows: