To check your wifi card is supported to sharing option or not..
Follow below steps..
(1)Open Administrator command prompt..(check out this tutorial to learn How to open Administrator command prompt in windows)..
(2)Type below code in command prompt..
netsh wlan show drivers
You can find lots of information..Find out hosted network supported option.If you there is yes beside this option then your computer wifi card is supported to sharing option..
Most of all computers are supported to sharing option.So relax..