what do i need to buy?
just bought a 2nd desktop for my home. i was told that i need to purchase a usb adapter for computer #2. in addition to a wireless router. i'm so confused, i don't want to spend more money if i don't have to.
For your second computer to connect to Internet, it has to be able to receive wireless wifi signal. That is what USB adaptor is for. Your router on the other hand must be wireless capable, so that it can broadcast wifi signals to your second computer.
If your existing router is wireless, there is no need for a new router. Also if you buy a laptop which typically is wireless capable, you do not need to buy a USB adaptor either. For desktop you can check whether it has a network card built in capable of wireless.