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.
Step 1: Make sure your computer is eligible for Windows 10. 1  Windows 10 is free for anyone running the latest version of Windows 7, Windows 8 and Windows 8.1 on their laptop, desktop or tablet computer. 2  You can figure out which version your computer by heading to Microsoft's website.tep 3: Update your current Windows version. You will need to install all of the updates for the current version of Windows you have on your machine. If you've set up automatic updates, you should be all set, but double-check first.