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.
October 20, 2007. How to find the version of Windows thatâs running on your computer â A dummies guide. To determine which operating system you have installed on the computer, follow these steps for any operating system other than Windows Vista: 1. Click Start, and then click Run. 2. In the Open box, type sysdm.cpl, and then click OK.