Can i use MyWi with an old computer?

I have an old computer that doesn't have a Wi-Fi feature, but it is able to connect to the internet through cable. However there's Wi-Fi in my house and i have a jailbroken iphone.

Can i use MyWi tethering, connect to Wi-Fi on my iphone and let my computer use this connection?

If not, is there an alternative solution to this problem? I need internet on this computer…

I don't think its a possible feature of MyWi, because MyWi is designed to do a Wi-Fi or USB hotspot from the internet that you are getting from your provider. However here are some possible solutions.

1) Buy any Wi-Fi adapters i have been using one called ALFA for 3 years now and it's working fine for me it connects using a USB cable and once you set it up it starts searching for the Wi-Fi networks.

2) use an Ethernet cable

Hope this helps.

Sorry, you can't use Wi-Fi in your laptop unless and until there's a Wi-Fi inbuilt Wi-Fi adapter in your laptop, but don't worry there's an alternate way to use Wi-Fi in your laptop, try to buy a Wi-Fi adapter or dongle that will help you to connect Wi-Fi even through mobile tethering also, there are lot of companies providing this adapter like ALFA, SONY, INDEX, sony, s is the best i guess, and don't forget to install driver software before using it. If you want you can fit an inbuilt Wi-Fi adapter also in your laptop if the manufacturer left the space to connect it. Before doing these all make sure your laptop does not have Wi-Fi feature.
you can check it like this
right click on "my computer" choose "manage" from list, click on devices and check for Wi-Fi option under device
thank you. Select it as a best answer if it is helpful.