bf4

Hi there 

iv just come back to play some BF4 on my pc and it wont work it comes up with this (We are sorry, Battlefield 4 will not run on your current operating sytem youll need to upgrade to windoes vista (6.0) or newer to play).......  I dont understand what it means i have a new computer and its statrts can run bf4 on ultra ☹️ ... help ?