Microsoft announced the general availability of Windows 8.1 today. The natural question to ask is, should I upgrade or not? Will my existing software work? Will my Creative Cloud apps continue to work?
Adobe and Microsoft have worked closely together to test Adobe® Creative Cloud applications and Adobe Creative Suite 6 applications for reliability, performance and user experience when installed on Intel® based systems running Microsoft® Windows® 8.1. There are currently no known issues. Adobe Photoshop® CS5, CS4 and CS3 were also tested with Windows 8.1 and there are currently no major issues known.
Read the complete OS Compatibility and FAQs for Windows 8.1.
As with any new release of an OS, there may be unexpected issues that arise that were not discovered during testing. If you encounter any issues, please report them using the bug reporting form.
To check if your software is compatible with Windows 8.1, you can also visit the Windows Compatibility Center, and check for specific software.
There is a reported issue that the spanish version of Illustrator CC in does not start on Windows 8.1. A resolution is posted on the following KB document: http://helpx.adobe.com/illustrator/kb/illustrator-does-not-start-windows-81.html