I got online with customer support and was told based on my system(win98) on an older pc I needed this adapter. I got it here and could not get it to work, tried calling for days..all times of the day to reach customer support..never an answer(lots of automated stuff) Wound up using it on a laptop instead, it gets really crummy reception even in the same room as the router. Loses signal frequently during gaming. I'm going back to wally worlds belkin. If you get an 'N'..it works great, they just have to be replaced about once a year from burnout.