Before I got my laptop, I only used my desktop to go online. When my laptop arrived, I unplugged the internet cable connecting modem to my computer and connected a new one to my laptop. When I want to use my desktop to go online, I just switch the internet cables. After a week of doing that though, my laptop suddenly shows that I have three broadband connections (all connects using the same password), and my desktop couldn't connect anymore. My desktop could always connect before, so I assume I clicked the wrong things on my laptop that caused this connection problem.