Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Simply does not work

I bought this product for my fathers old laptop (with windows xp) since it didnt come with a wireless modem. I followed the instructions that came with the adapter, I downloaded the drivers it needed, but when the installation told me to plug in the adapter, the adapter wasn't recognized, i thought it was the old computer, so i tried it in my newer laptop with w7 but the same thing happened, finally i tried it with a desktop (with windows vista), and once again the adapter wasn't recognized.I spent about 3 to 4 hours trying to make it work.I will be returning this product asap and ask for my money back, i don't want a replacement because i wouldn't buy this thing again.