I can't get on the wireless internet. Where is the hardware turn-on switch to allow access on the laptop?

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Enable / Disable an Enterprise Laptop's Wi-Fi
Wi-Fi, short for Wireless Fidelity, is networking technology that allows you to connect to the Internet. If you have a wireless-enabled Latitude computer you can connect to the Internet when in range of an access point called a hotspot.
When not in use your Latitude's wireless card should be disabled. By disabling Wi-Fi, you will receive two benefits:
Start-up times will be much faster.
If the wireless card is ON and you are out of the office (not connected to your normal, wired connection), the laptop will try to use the Wi-Fi network during the login process to run the various start-up scripts, etc. It will eventually time-out (fail). By having the wireless card turned OFF, the start-up process will be much faster.
Computer will not continually search for a wireless network (and waste battery life).
If you are in the office (connected to your normal, wired connection) or in a location where there is no wireless hotspot, you don't need to have the computer waste processing power by looking and looking for a wireless hotspot. By disabling Wi-Fi, you will gain a little more power for your other tasks. In addition, you will maximize your battery operating time by disabling wireless activity.
NOTE: After your Latitude has started up completely, you can ENABLE the wireless card and connect to a wireless hotspot. For example, a wireless router at your home or at a local coffee shop. If you have connected to this hotspot previously, the wireless card should connect automatically for you.
NOTE: Once you have the wireless card enabled, before you shut down the computer, you should again DISABLE the card. The computer will then be ready for the next time you turn it on with wireless turned off.
Enable / Disable with Hardware Switch
The more recent Latitude models have a wireless switch to enable or disable wireless network devices and the
Wi-Fi Catcher Network Locator.
Dell Latitude E6420 and E6520 Series
These laptops have a small switch on the RIGHT side of the keyboard. The switch is toward the front of the laptop. The Wi-Fi Catcher™ icon will is above the keyboard. You will see a lit radio tower if the wireless switch is enable

Hi,
How to configure wireless access point using a laptop
Wireless technology makes connecting to the Internet possible from anywhere within the range of the network. Unfortunately, not all Internet-capable devices have wireless technology, and many still require an Ethernet port connection. If you have a laptop with a wireless card and an Internet connection, you can make the laptop a wireless access point and share that connection with other devices, whether your laptop runs a Windows or OSX operating system. Windows computers allow other devices to access the wireless network via a physical connection to the laptop, while OSX computers allow AirPort equipped devices to connect as well, creating a second wireless bubble for the network.

Instruction:
WINDOWS
1 Turn on the laptop and the device with which you will share the connection. Ensure the laptop's wireless card is turned on and you have an Internet connection.

2 Connect an Ethernet cord to the port on the laptop, and the other end to the receiving device. You need to make the connection first, or you will not be able to access the sharing options for the connection.

3 Open the list of network connections on the computer. In Windows 7 and Vista, access this list by typing "Network Connections" into the Start menu search bar and pressing "Enter." In Windows XP, click on "Network Connections" in the Network and Sharing Center section of the Control Panel.

4 Right click on the wireless connection and select "Properties," then navigate to the Sharing tab. This tab will not appear unless both devices are connected.

5 Check the box marked "Allow other network users to connect through this computer's Internet connection." Click "OK" to save the changes.
OSX
1 Click on the Apple menu and select "System Preferences." Click the "Sharing" option, then choose "Internet Sharing."

2 Select the Airport and wireless network in the "Share your connection from:" drop-down menu.

3 Select an output format for the connection in the "To computers using:" drop-down menu. Choose "Ethernet" for a physical connection or "AirPort" for wireless broadcasting.

4 Turn on the device you wish to receive the connection. Connect the devices with an Ethernet cable, or turn on the receiving device's AirPort card and connect wirelessly.

Just having the wireless router without connecting it to cable modem or DSL modem will not allow you to get onto the Internet. The wireless card in your computer/laptop will allow you to get onto the Internet at a free public WiFi hot spot location such as McDonalds, Star Bucks, at the airport.
Also the wireless card in your computer/laptop may allow you to connect into an unsecured wireless router from your neighbors, if their wireless router is within range of your computer/laptop but without their permission to use their Internet, it is considered stealing from your neighbor. They have a set download limit from their Internet Service Provider and by you connecting to their ISP you may cause them to exceed their download limit and they would be charged additional costs for every Mega byte over their limit.

when you first turn your laptop on push either f8 or f10 to open set up mode.this will allow you access to the default switches.the wireless default switch will be located in this set up mode

well try to instal acpi utility for it and usualy should work

the the router settings and max dhcp allowed

either ur on a static ip so configure the numbers properly still no help , upgrade the firmware and reconfigure the router

Your laptop has a hardware wireless switch to turn on or turn off wireless transmission.
Look for it and make sure it is turned on.
I don't know your laptop model, but the switch is probably located in the font of the computer, besides the SD card slot. It might be marked "Wireless" and when turned a light should signal it.

Theres a little slide on (or flip) switch to turn on your wireless. It can also be slide (or switch) off to turn off. Its usually located in the lower right front and sometimes its on the side depending on the model of your laptop. Theres usually a quick reference guide that comes with the laptop and that will show you where the USB ports are at, serial ports, AC jack, audio jack, CD Rom, and specifically where your wireless switch is located. There will also be a light ( blue or green indicating its on ) so once its on it can pick up wireless router signals, hence allows you internet access.

You can try to power cycle your entire network (refresh).
This often happens when you have a large network.

1. power down ALL Computers and disconnect the desktop from the D-Link Switch.
2. turn off all SLAVE AP's first.
3. Turn off the Master AP and disconnect one end of the Ethernet.
4. Turn off the D-Link Switch and disconnect one end of the Ethernet.
5. Now, turn off your modem.

Leave them for about 10 to 15 minutes, depending on your urgency.
Turn on and connect all devices in the EXACT order.

1. Turn on the modem. wait 2 minutes.
2. Turn on the D-Link Switch and wait 1 minute. Then connect the Ethernet to the MODEM.
3. Turn on the Master AP and wait 1 minute. Then connect the Ethernet to the D-Link Switch.
4. Turn ONE of the Slave AP's. Turn on your Laptop. try to connect to the Internet. If successful, Disconnect from the network on the computer and proceed to turn on the rest of the Slave AP's, Laptops, and Desktop. If its NOT successful, power on the Desktop and try to connect to the internet.

• If the desktop connects to the Internet, Check your D-Link's homepage "192.168.1.1" (default) for any wrong settings. If it does not connect, check your DSL Modem's settings.

If the above does not work, post what you did the day before this happened. Probably something small might have messed with the network.

You have not mentioned having a wireless router or access point to serve as the hub on an infrastructure network. I you have a router please let me know -- the instructions for the solution changes.

The following is an article to create an ad hoc network between wireless cards without a wireless access point or a router. If you ignore the steps about connecting to the internet with a wired connection and the internet sharing instructions. This will allow your machines with wireless adapters to communicate with each other (assuming the operate on a common band). The article goes on to indicate one machine with a wired connection can act as the "router" for the other two when it is on to allow them share internet access with the wired machine (the wired machine also needs a wireless card for this to work).

Ad-hoc networking access point