Here's some options, first if the card is in the bottom PCI slot, under the graphics card, put in the top one just above the graphics card, second. The second option is that the wifi card is disabled so to fix this do the following steps, on you desktop, hold the windows, key and press x, the a little tab should come up on the bottom left corner, select device manger, go to network adaptors and click the little arrow on the left of it, find the wifi card, it should say the brand and model number, right click. It should either say enable or disable, don't press disable if it says disable, if it says enable press it and wait a few seconds and it should be enabled.