Installing a wireless card in Linux is quite different to what you would do under Windows.
Firstly, what you need to do is identify the distribution you are using, Mint, Fedora etc. and the version you are using.
Some distributions make the software/firmware available for different wireless cards but don't include it on their CD/DVD.
Secondly, you need to provide more information on the card.
If you run the command:
in a terminal and post back the result, someone may recognise it and be able to help.
Ah, I see from your icon Ubuntu, it'll still be useful to know which version.