I have a similar problem with my new laptop. In my case, I believe that it may be because I might have accidentally disabled DHCP or DNS on its wireless adapter while adding a wireless router to my local area network.
I can see all my PCs from any other in my LAN, and connect to the internet with all of them, including my laptop. But after I turn off my wireless router, I can no longer use my laptop to get to the internet through any free wi-fi hotspots the way I did even a few minutes earlier.
I am, of course, trying to resolve this problem. Stay tuned and I'll keep you informed.
Follow up:
I found excellent advice at: http://www.cabnr.unr.edu/IT/Wifi.aspx It turned out that I should not have specified a particular gateway in the settings of my wireless network card as I have enabled it for getting DHCP automatically.
Of course, you can. You have to have a wireless router connected to a modem or directly to internet channel.
A laptop IS a computer. They can certainly be used for most applications without being connected to anything. Many have wireless capability and can connect to the internet without being directly connected to anything else, but they are connected, it's just wireless.
Yes, This is for adding a wireless antenna to a desktop or laptop computer that does not have wireless built in. You still need a wireless router connected to your internet provider.
If your computer connected to internet with a cable, yes, you can disconnect wireless.
yes it is possible
A wireless router will usually be connected directly to a high speed modem between the modem and any other device. This allows the router to correctly pass internet requests from the local network (computers connected wirelessly or to a standard port) to the ISP (the high speed modem connected to the Internet port). Connecting a wireless router to a computer would be unusual but it could function if connected to the network port on the computer provided the router-computer connection was properly configured. In this case the computer would have to be configured to route.
If you want to have internet on that laptop you need to be connected to internet provider which usually happens directly (connected to the modem) or indirectly (connected to the modem through wired or wireless router).
If you have a computer which is not connected to Internet (or other networks, LAN, Wireless network...) you can call it a standalone computer.
One has to be connected to a base In a wireless home network, there is no requirement for a computer to be connected, via wire/cable. The modem must be wired to router is the only requirement.
Yes. However, you will lose you INTERNET connection if you were connected via a wireless router.
Yes, you do. Even if you are going to have only one computer connected wiressly you need to have a wireless router for that.
when im not connected to the internet, the computer will run fine. when i turn on the wireless internet connection, the computer turns off and the same happens when i use a wire to connect to the internet.