I know absolutely nothing about computers. I have a ET1641 and I need wifi to hook up to my landlord's router (please excuse any horrible mangling of computer speak, I think that's what its called) What do I have to get to make this thing wifi capable (compatible?) It runs windows vista, as you all probably know. I chatted with the support tecnicians to try to get some help but since the computer is no longer under warranty they couldn't even tell me what to buy!

Any help would be much appreciated since I need my desktop for an online class I'm taking and I don't want to download a bunch of school crap onto my son's laptop (I got him the laptop specifically so he wouldn't use my computer all the time so it would be hypocritical of me to be using his) Thank you for any help you all can give me.