There are two way to check.first is you can directly check whether key contain A or not in binding like this:-. but i think this is not the better way so instead of this you can use ko.computed to check.
Check for operating system information in Windows 7. 1  Click the Start button , enter Computer in the search box, right-click Computer, and then click Properties. 2  Look under Windows edition for the version and edition of Windows that your PC is running.
How to Verify If You Downloaded or Installed the Latest Version Windows 10. Summary. Microsoft released its first major update to Windows 10 in early November, called the 'November Update' or 1511. The update includes significant enhancements making Windows 10 easier to use and ready for business environments.