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The computer I am using right now is windows xp sp2. The only way for me to access the internet is to connect directly to this computer. I have the linksys wireless-g 2.4ghz 802.11g with speedbooster broadband router. If i connect this computer to the router and try to get internet access I cannot. There are 3 other computers in the house that need internet also. One of them is a desktop with xp sp1 which I instaled the pci adapter into. The other two computers are laptops with wireless network cards already in them. The one laptop is xp sp1 the other is xp sp2. All of the computers used to be able to connect to the internet, but earlier today I was messing with one of the laptops and that laptop couldn't connect to the internet anymore. Then I messed with the main desktop which is directly connected to the internet to try to fix the laptop problem, only to ruin the network for all the computers. I need help.
 

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Some more detailed information regarding "messed with" would be helpful.

Maybe an analogy will help. Would you drop off your car at a repair shop and just say you were messing with it, now it doesn't work and then expect them to fix it, know what is wrong or even where to start.

Just give a little more of a hint. Were you messing with network settings? If so, which ones. Do any computer work. If so what are the differences like IP addresses, subnet masks, dns and gateway IP addresses (start / run / ipconfig /all)
 

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Ok, I'll jump in with a couple of things to check. Shut everything down and bring it back up - not sure the order, but maybe try internet modem, router, computer. Get the one directly connected to the router first going then worry about the others.

Also, you may have set up your router to broadcast a specific ip range. Check to see what ip address your computer is using - one way to do this is "start, run, winipcfg". Oh, poo, this may not work on xp. But I googled it real quick and apparently there's an nt version of that nifty little app at microsoft. This site tells you how to get it: http://www.activewin.com/tips/tips/microsoft/winxp/basic/23.shtml. Maybe someone here can give an easier way to check to see what ip address you are being assigned by the router. In windows98 with winipcfg you could acutally pick your network adapter and see the ip address it was assigned by the router, and tell it to "release all" and refresh it. Sometimes if there's a network access problem, this fixes it.

I'm mentioning this because in our office we had a problem with the linksys wireless router we tacked onto our peer-to-peer network broadcasting a goofy ip address range. We sometimes have to unplug and plug it back in to get it to pick up the right one.

Have you checked for viruses and malware? Perhaps something is causing denial of internet access. :(
 

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Sorry but I should have made it

Start / run / cmd

Then IPCONFIG /ALL

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What are the differences when connected to the modem and router.
Are there any other computers that work when connected to the router
How is the modem and computer connected to the router
How is the router configured
Did it ever work
If so, what has changed.
 

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68.50.80.1 - that's an odd ip address. Do you have any information that came with your router where it says what the default is?

Can you access the router settings url?
 

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As requested run IPCONFIG /ALL for when connected directly to the modem and to the router. In looking up 68.50.80.1, that is a comcast address so I assume you got it when directly connected to the cable modem.

Then post the IP address, subnet mask, gateway and dns entries.

Also please give details to the other requested information. Getting only a little bit at a time is going to make this a long slow process.

You might also try turning off the cable mode, router and computer. Turn on the cable modem and wait a minute or so. Turn on the router and wait another minute or so. Then turn on the computer.
 
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