First of all i'm running windows 7. I have comcast cable internet connection. I am using a linkys cable modem to connect my desktop. I want to connect the wireless router so that i can have internet connection on my laptop. when I plug in the router and conncect it to the modem, i can no longer get the internet connection on the desktop. somewhere it's going haywire. can you help me please

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if your modem is plugged directly to the pc, you may need to refresh your ip addres... you can do this by doing the following.
In windows Vista and 7 Click Start In the small search box, type cmd and press enter. in the black box that pops up type ipconfig /renew
if that doesn't work, try unplugging the power cable from the modem, wait 30 seconds, then plug the modem back in (while the computer is running)

Can't connect to the Internet using Windows 7 OS.
1. If you haven't already done so, run the Network troubleshooter to see if it can help diagnose and solve your problem.
Open the Network troubleshooter by right-clicking the network icon in the notification area, and then clicking Troubleshoot problems.
2. Make sure that all cables are connected (for example, make sure your modem is connected to a working phone jack or cable connection, either directly or through a router).
3. Restart your modem, and then restart your router. Remove the power cable from the modem and router. After all lights on the device have gone out, wait at least 10 seconds, and then plug the modem and router back in. Some modems have a battery backup that prevents the lights from going out. For this type of modem, press and quickly release the Reset button.
4. Check your router. Because of the new networking features in Windows Vista andWindows 7, some older network routers are not fully compatible with these versions of Windows and can cause problems. You can test your router to see whether it is fully compatible with Windows 7 by running the Internet Connectivity Evaluation Tool. Or, for a list of routers that are compatible with Windows Vista, go to the WindowsCompatibility Center website.

Use an Ethernet cable to connect the port on the Comcast modem to the WAN port on the Berklin (Belkin????) router.
Use another Ethernet cable to connect one of the LAN ports on the router to the Ethernet port on your computer.
Start Internet Explorer on your computer.
Connect to the web-interface inside the router.
Run the "network setup wizard".
Run the "wireless setup wizard".

YOU WILL NEED TO GET A WIRELESS ROUTER TO BE ABLE TO USE THE LAPTOP WIRELESS, iT IS A VERY EASY SET UP AND CONNECT THE DESKTOP WIRED AND THE LAPTOP WIRELESS TO A WIRELESS ROUTER.

first call comcast that you'll use a router with the modem.
then connect the cable modem to the router.
then connect the desktop to the router and use the supplied cd.

You may be running into a problem of your ISP only allowing one computer on the internet. while the internet is on can you access the internet from the desktop comcast originally setup?  If so that is more then likely your problem.

I have comcast myself and they told me they do not allow home networks. I fixed that problem by using the mac address cloning feature in my router.

The setup cd is also junk, all you should really need to do is:
1. unplug modem, router, and turn off computers
2. Plug modem into router
3. Plug computers into router (don't worry about wireless right now)
4. Turn on modem, wait 20 seconds or so for lights to set,
5. Turn on router. again wait for lights to set
6. Turn on ONE computer that is hard wired into the router
7 Try to surf the net.
8. If successfull try to connect wireless computers (Without using cd) and see if they surf.

If not call comcast and see if your computers are trying to obtain real-world ip's instead of LAN ip's like they should.
If so, you'll need to enable DHCP on the router.

Hi jad123,

I am sorry to learn about the problems you are experiencing with your service.

I will be happy to reach out to my contacts to assist you in resolving this issue. Please feel free to contact me so that I can get more information from you.

Thanks in advance!

Mark C.
Comcast Executive Offices
[email protected]

The following article will describe how to setup Comcast High Speed Internet with a Linksys Router: Connecting your cable modem to the Router 1. First connect directly to your Cable modem without the router and verify that you can get on line. 2. Once you've verified that you can get onto the internet without the router please proceed. If you can not please contact your ISP for further assistance. 3. Now unplug the Ethernet cable that connects to your DSL modem from the back of your computer. 4. Take the connection that you just unplugged from the back of your computer and connect it to the WAN port of the router. 5. Take a different Ethernet cable and plug it into port closest to the WAN port, or into the LAN port. 6. Look on the front of the router. The following lights should be illuminated: - Power - WAN Link - Link/Act (On the port that you connected your computer to) - Note If other lights other than Link/Act are illuminated on this port, that is normal - You may have a few other lights illuminated depending on the model number router you have, but the 3 above must be illuminated for proper connection. 7. Hold the Reset button on the router for 30 seconds or more 8. Restart your computer Checking the MAC address of your Computer Please follow these steps from the computer that was connected directly to the internet with out the router. If you do not, then you may not be able to connect to the internet properly. A. Windows 9x/ME 1. Click on the Start button and click on the Run option 2. When the "Run" window opens please type in winipcfg and click the OK button 3. When the "IP Configuration comes up" click on the gray box the black arrow and select your Ethernet card. 4. Please make note of the "Adapter Address" B. Windows 2000/NT/XP 1. Click on the Start button and click on the Run option 2. When the "Run" window opens please type in cmd and click the OK button 3. When "Command Prompt" appears type in ipconfig /all 4. Please make note of the "Physical Address" Configuring the Router 1. Go to your desktop and double click on Internet Explorer (Located on the Start Menu in Windows XP). 2. When "Internet Explorer" opens type http://192.168.1.1 into the "Address" bar and click on Go. 3. The "Enter Network Password" window will appear. 4. Skip user name and type admin (admin is the default password) as the password, and click OK. 5. By default the router will be set to Obtain an IP Address Automatically. 6. Click on the Advanced tab. 7. Click on the Mac Addr. Clone. 8. When the page loads, input the Adapter/Physical Address you made earlier and input it into the proper fields. 9. Click Apply Finishing the Setup 1. Shut down your PC. 2. Unplug the power from the back of the router. 3. Unplug the power from the modem. 4. Wait for 30 second. 5. Power up the modem. 6. Wait for the lights to stop blinking. 7. Power up the router. 8. Start up your computer. 9. Surf the internet. - *Note: If you are still unable to get on to the internet please repeat from step 1.

The following article will describe how to setup Comcast High Speed Internet with a Linksys Router: Connecting your cable modem to the Router 1. First connect directly to your Cable modem without the router and verify that you can get on line. 2. Once you've verified that you can get onto the internet without the router please proceed. If you can not please contact your ISP for further assistance. 3. Now unplug the Ethernet cable that connects to your DSL modem from the back of your computer. 4. Take the connection that you just unplugged from the back of your computer and connect it to the WAN port of the router. 5. Take a different Ethernet cable and plug it into port closest to the WAN port, or into the LAN port. 6. Look on the front of the router. The following lights should be illuminated: - Power - WAN Link - Link/Act (On the port that you connected your computer to) - Note If other lights other than Link/Act are illuminated on this port, that is normal - You may have a few other lights illuminated depending on the model number router you have, but the 3 above must be illuminated for proper connection. 7. Hold the Reset button on the router for 30 seconds or more 8. Restart your computer Checking the MAC address of your Computer Please follow these steps from the computer that was connected directly to the internet with out the router. If you do not, then you may not be able to connect to the internet properly. A. Windows 9x/ME 1. Click on the Start button and click on the Run option 2. When the "Run" window opens please type in winipcfg and click the OK button 3. When the "IP Configuration comes up" click on the gray box the black arrow and select your Ethernet card. 4. Please make note of the "Adapter Address" B. Windows 2000/NT/XP 1. Click on the Start button and click on the Run option 2. When the "Run" window opens please type in cmd and click the OK button 3. When "Command Prompt" appears type in ipconfig /all 4. Please make note of the "Physical Address" Configuring the Router 1. Go to your desktop and double click on Internet Explorer (Located on the Start Menu in Windows XP). 2. When "Internet Explorer" opens type http://192.168.1.1 into the "Address" bar and click on Go. 3. The "Enter Network Password" window will appear. 4. Skip user name and type admin (admin is the default password) as the password, and click OK. 5. By default the router will be set to Obtain an IP Address Automatically. 6. Click on the Advanced tab. 7. Click on the Mac Addr. Clone. 8. When the page loads, input the Adapter/Physical Address you made earlier and input it into the proper fields. 9. Click Apply Finishing the Setup 1. Shut down your PC. 2. Unplug the power from the back of the router. 3. Unplug the power from the modem. 4. Wait for 30 second. 5. Power up the modem. 6. Wait for the lights to stop blinking. 7. Power up the router. 8. Start up your computer. 9. Surf the internet. *Note: If you are still unable to get on to the internet please repeat from step 1.