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.
This means you can download and install the 64-bit version of any Microsoft software if you acquired a copy of the 32-bit version with Software Assurance.You can also upgrade for free if your license is still valid within two years of initially receiving it.or example, if you request Office 2010 through TechSoup, and if you request the 32-bit version, you'll be entitled to download the 64-bit version at Microsoft's Volume Licensing Service Center (VLSC) .