Installing dell wireless 2350 router gets configuration failure

My first thought would be to try different forms of encryption on your router. It's possible that your printer may not support the type of encryption you're trying to use which may be causing it to have trouble connecting. For example, if you're using WPA encryption, try switching to a WEP key instead. You can change all of these settings from your Wireless Router's configuration page.

You will need to check the wireless settings of the
router
is there any computer connected to the router ?
If yes then you can open the router set up page on
that computer.
Router set up page is the page where you can check
all the wireless settings of the router.

once you get the wireless settings of the router, you can try to connect to the wireless network.

Click here for step by step instructions

Are you trying to set up the router with the disc.
You can also set up the router manually.
that is very easy.
Click Here to know how to set up the router.

The first router must the root AP and the second should be set to Wireless Repeater. Follow the steps on how to resolve this setup.

1. Get the Wireless MAC Address of the main router. The router has two MAC addresses, one is wired and 1 is wireless. To determine the wireless MAC address, go to Status page of the router, there's a sub tab there for wireless and you'll see the Wireless MAC Address. Take note of it.

2. Access the setup page of the 2nd router. Change the LAN IP address to 192.168.0.2 then save. Power cycle it by just turning it off for 10 seconds then turn it back on. You can now change it to Wireless Repeater and there's an option for you to type the Wireless MAC address of the main AP. Make sure all wireless settings are the same on both routers like SSID, Channel and Encryption Key. Save your changes after that.

3. From your computer, try to ping the 2nd AP which is 192.168.0.2. If it replied back, you're all set.

Good Luck!

Do you mean you have forgotten the wireless password for your network?

If so , there is are several tools available online which recover the wireless key as long as you have previously connected to that network from your computer.

Try http://www.nirsoft.net/utils/wireless_key.html

I see. You can try changing the wireless settings of the router. You can do that by accessing the web based utility of the router. Here are the instructions:

1. Click the Start button, and then click Run.
2. Type the following text in the Open box: http://my.router
3. If this is the first time configuring your Dell Wireless 2350 Broadband Router, or if the user name and password have not been changed from the default settings, type admin in the User Name field and admin in the Password field.
4. Click the OK button. The Configuration screen appears.
5. Under the Basic settings, under Wireless Settings change the channel from Auto to 1, 6, or 11.

If that does not work, you can try updating the firmware of the router. You can download the firmware from this site:
http://www.dell-drivers.com/dell-drivers-downloads/Dell-Wireless-2350-Broadband-Router_8689.shtml

Here are the instructions on how to upgrade:

1. Reaccess the configuration page of the router using a wired computer.
2. Click on System Tools, find Firmware Upgrade.
3. Click Browse and search for the firmware you downloaded from the site I gave you earlier. Select it and then start the upgrade. Let the firmware finish its upgrade.

Try updating the driver for your wireless adapter.

Before we have the wireless configuration discussion are you aware this computer has a WLAN on/off switch. I appears to be a recent feature to conserve battery live in some models.

Please reply if there are configuration isues you wish to discuss.

Well before throwing it out try updating the firmware. That might help a little. http://search.dell.com/results.aspx?c=us&l=en&s=bsd&cat=sup&cs=04&k=2350&img=True&sum=True&ssum=False&qmp=25

sometimes windows messes the whole network up when using the set up wizard, you need to go to the properties of your wireless cards and check on the TCP/IP line that the radio button that says obtain ip address automaticaly is ticked. Go into the routers properties menu and check that DHCP is enabled and so allow the router to allocate ip addresses automatically, although you may need to do this via an rj45 cable and not wireless to begin with.