Microsoft will be ceasing support to Windows 8.1 in May ,2014. This means that the software giant will no longer distributing security updates to 8.1 users. Microsoft plans to continue supporting Windows 8 and Windows 8.1 Update.
What does this mean for users? It means that if you currently have Windows 8.1 installed, you must get the 8.1 Update installed as well by May 2014. This will ensure that there is no gap in your security coverage. If you only have Windows 8, Microsoft assures us that they will continue 8 security updates.