I failed the operation system test? What should I do?

Operating System Requirements are as follows: Windows XP, Vista, 7 or later, Mac OS X 10.6 or later, or Linux: RHEL 5.6 or later, openSUSE 11.3 or later, or Ubuntu 10.04 or later. Don’t know what system you’re using? No worries, just click here for your system details. 

To update your PC's operating system (Windows) click here:

https://support.microsoft.com/en-us/help/311047/how-to-keep-your-windows-computer-up-to-date

To update you Mac's operating system click here: 

http://www.apple.com/osx/how-to-upgrade/