I changed my network access password and now my computer using a netopia usb adapter won't connect me to my modem

With a wireless connection, your PC can connect wirelessly to a network printer. In addition, you can set up your PC in a location where no phone line or cable connection exists. Outfitting your desktop to a wireless Internet connection is very easy. Just follow these simple steps and you'll be surfing the net wirelessly in a matter of minutes.
Find out if wireless Internet reception exists where your computer is located. If you're located very close to a W-iFi hotspot, like a coffee shop, you may be able to use this network to get wireless Internet for desktop PCs. Also, some apartment complexes and college dorms have free wireless Internet. Your neighbors may have wireless Internet too, which you can ask them if you can use. Buy a wireless network adapter for your desktop. You can obtain an adapter from most electronic stores. Be sure to get a wireless adapter with the proper strength, which depends on how far you are from the wireless hotspot. The easiest adapters to install are those that just plug into an available USB port. Set up your wireless Internet for your desktop PC according to the instructions that came with the wireless adapter. The usual procedure is to plug the wireless adapter into an available USB port. Windows will install the appropriate driver. After your PC recognizes the wireless adapter, select the "Connections" icon in the taskbar (represented by vertical bars). A list of available connections will appear. Select the desired connection. If you are prompted for a password, enter the appropriate password. Click "Connect." You are subsequently connected to a wireless network. Launch your browser and enjoy surfing the Internet wirelessly. If you are the owner of the wireless network, secure your wireless network with a password. To do so, navigate to the "Start" menu and select the "Control Panel." Then select "Network and Internet" and "Network and Sharing Center." Click "Change adapter settings" in the left pane. Double-click the icon of the appropriate wireless connection. The Wireless Network Connection status window appears. Click the "Wireless Properties" button. Select the "Security" tab and select an encryption type from the drop-down selection. Enter a password in the Network security key field. Make sure that the password matches the router settings. Press "OK" when done. Get a wireless internet router for your Internet connection if there is no wireless Internet already in your area. You can buy these online, or at electronic stores. You'll need to set up your router using the accompanying instructions and your own Internet service provider. This is best in a home with multiple computers.
You will have to open up your network connections Click start control panel network connections this may vary depending on your operating system look for local area connection if you see a red x or a yellow exclamation or question mark ! ? you will need to update or install the driver or it could be firewalled, If you are trying to connect through a modem/router you it should have come with a disk then you might have to connect the usb lead to your modem to get a connection then Click start control panel administration tools computer management device manager scroll to network adapters should see a yellow question ? exclamation mark ! or a red X right click install drivers. The driver might be on the disc supplied by your ISP internet service provider or the motherboard disc Click start type cmd press enter you will be in DOS mode type in ipconfig press enter you will see all o fyour internet connection details type in your default gateway adress into your internet search should read something like 10.0.0.138 Make sure you Ethernet/internet is enabled in bios restart your computer during the boot up process you will see on your screen a certain key to press to enter set up (BIOS) press and hold that key to enter bios using arrow keys navigate to integrated peripherals look for SiS On Chip Pci Device press enter scroll to SiS 10/100m press enter make sure its "Enabled"imake

CALL YOUR ISP FIRST.
wi-Fi Protected Setup (WPS) is a standard for easy and secure wireless network set up and connections. Some of NETGEAR's products use the name Push 'n' Connect for WPS. To use WPS, your product must support WPS and be compatible with WPA security. WPS can automatically set up a random network name (SSID) and strong WPA wireless security for wireless routers, access points, computers, adapters, Wi-Fi phones, and other electronic devices. WPS lets you use a push button or enter a personal identification number (PIN) instead of manually entering a network name (SSID) and password:

• Push button. The WPS button is either on the product or a clickable button on a wizard or utility screen.

hi

find link for network issue
https://www.drivereasy.com/knowledge/acer-laptop-not-connecting-to-wifi-solved/

Try Password: admin, 1234, serial number of unit (written underneath)

Or you could connect to it with a Ethernet Cable and open web browser and go to 192.168.1.1 or 192.168.1.0 or 192.168.1.254 and you can access settings from there and change WEP password.

Last resort, just use the reset button on the unit.

To secure your wireless network from unauthorized access,please click on this link and follow my instructions :-http://www.fixya.com/support/r3559128-wireless_router_security

Hi,
* 1 Unplug your DSL modem and D-Link router. In order for the network to properly recognize its devices, these devices must be attached in a specific order.

* 2 Plug in your DSL modem's power cord. There is usually no power button on a modem. Simply plugging in its electrical cable will turn it on. Give your DSL modem a couple minutes to re-establish its connection to AT&T's network before taking any further action.

* 3 Plug in your D-Link router's power cord. Like the DSL modem, this router will probably not have a power switch; simply plug in the power cable, and it turns on. Let the D-Link router sit for a couple minutes while it establishes its connection to the DSL modem and AT&T's network.

* 4 Physically attach your computer to the router with an Ethernet cable. Even if the router and modem are wireless, a physical connection must be established to properly configure the router. If this is not a wireless network, then your setup procedure is essentially complete.

To access a D-Link router on your network, open an Internet browser and navigate to the 192.168.0.1 address. This will bring you to your D-Link router's interface. The default User Name is "admin" (without the quotes), and there is no password. Enter the User Name and click the "Log In" button. This will bring you to the Setup window. Refer to your D-Link router's documentation for changing the default password (highly recommended) and forwarding ports.

If this is a wireless network, you have a couple further steps. First, change your network's SSID (Service Set Identifier) title, so that you can recognize it when other wireless networks are nearby. Also, choose your wireless encryption and passphrase. WPA2 (Wi-Fi Protected Access 2) is a solid option. Specific instructions depend on your model of D-Link router; so refer to your documentation (which can usually be found at the manufacturer's website if you do not have it on hand).

* 5 Disconnect the Ethernet cable from your computer. Your new wireless network should be visible with your computer's wireless adapter. Windows and OS X will notify you of networks in range when your adapter is active. Connect to the one with your SSID, and enter the passphrase.

Here's a driver-free, software-free solution.

Turn your cable-modem (or DSL-modem) off.
Turn your Netopia off.

Connect:

Ethernet--port on cable-modem <-- cable --> WAN port on Netopia.

One LAN port on Netopia <-- cable --> network-port on your computer.

Turn the cable-modem on, and wait until its lamps settle-down to a repeating pattern.

Turn the Netopia open, and wait until its lamps settle-down to a repeating pattern.

Restart your computer.

Click Start
Click Run
Type CMD
Press Enter
Type IPCONFIG
Press Enter
Look for output like: Default Gateway ... 192.168.123.456
Start Internet Explorer
Type http://192.168.123.456 (or whatever numbers you see)
Login to the web-server running "inside" the Netopia.
Click to run the "Wireless Networking Setup Wizard".
Enter an SSID of your choice.
Select the 'WPA' level of encryption.
Enter a network-password of your choice.
Click OK
Restart the router (if it did not automatically restart).

Disconnect the Ethernet cable from your computer's network-port.
Click "View Available Wireless Networks".
Click the SSID of your new network.
Click Connect.
Enter the password, when prompted.
Voila! You have a wireless connection to the internet.

1. Choose your wireless equipment The first step is to make sure that you have the equipment you need. As you're looking for products in stores or on the Internet, you might notice that you can choose equipment that supports three different wireless networking technologies: 802.11a, 802.11b, and 802.11g. We recommend 802.11g, because it offers excellent performance and is compatible with almost everything.
Shopping list

• Broadband Internet connection
  
• Wireless router
  
• A computer with built-in wireless networking support or a wireless network adapter
  

A wireless router
The router converts the signals coming across your Internet connection into a wireless broadcast, sort of like a cordless phone base station. Be sure to get a wireless router, and not a wireless access point.
A wireless network adapter
Network adapters wirelessly connect your computer to your wireless router. If you have a newer computer you may already have wireless capabilities built in. If this is the case, then you will not need a wireless network adapter. If you need to purchase an adapter for a desktop computer, buy a USB wireless network adapter. If you have a laptop, buy a PC card-based network adapter. Make sure that you have one adapter for every computer on your network.
Note: To make setup easy, choose a network adapter made by the same vendor that made your wireless router. For example, if you find a good price on a Linksys router, choose a Linksys network adapter to go with it. To make shopping even easier, buy a bundle, such as those available from D-Link, Netgear, Linksys, Microsoft, and Buffalo. If you have a desktop computer, make sure that you have an available USB port to plug the wireless network adapter into. If you don't have any open USB ports, buy a hub to add additional ports.
2. Connect your wireless router Since you'll be temporarily disconnected from the Internet, print these instructions before you go any further.
First, locate your cable modem or DSL modem and unplug it to turn it off.
Next, connect your wireless router to your modem. Your modem should stay connected directly to the Internet. Later, after you've hooked everything up, your computer will wirelessly connect to your router, and the router will send communications through your modem to the Internet.

• If you currently have your computer connected directly to your modem: Unplug the network cable from the back of your computer, and plug it into the port labeled Internet, WAN, or WLAN on the back of your router.
  
• If you do not currently have a computer connected to the Internet: Plug one end of a network cable (included with your router) into your modem, and plug the other end of the network cable into the Internet, WAN, or WLAN port on your wireless router.
  
• If you currently have your computer connected to a router: Unplug the network cable connected to the Internet, WAN, or WLAN port from your current router, and plug this end of the cable into the Internet, WAN, or WLAN port on your wireless router. Then, unplug any other network cables, and plug them into the available ports on your wireless router. You no longer need your original router, because your new wireless router replaces it.
  
• 3. Configure your wireless router
  
• Using the network cable that came with your wireless router, you should temporarily connect your computer to one of the open network ports on your wireless router (any port that isn't labeled Internet, WAN, or WLAN). If you need to, turn your computer on. It should automatically connect to your router.
  Next, open Internet Explorer and type in the address to configure your router.
  You might be prompted for a password. The address and password you use will vary depending on what type of router you have, so refer to the instructions included with your router.
  As a quick reference, this table shows the default addresses, usernames, and passwords for some common router manufacturers.
  Router
  Address
  Username
  Password
  3Com
  http://192.168.1.1
  admin
  admin
  D-Link
  http://192.168.0.1
  admin
  
  Linksys
  http://192.168.1.1
  admin
  admin
  Microsoft Broadband
  http://192.168.2.1
  admin
  admin
  Netgear
  http://192.168.0.1
  admin
  password
  
  Internet Explorer will show your router's configuration page. Most of the default settings should be fine, but you should configure three things:
  
  1. Your wireless network name, known as the SSID. This name identifies your network. You should choose something unique that none of your neighbors will be using.
     
  2. Wireless encryption (WEP) or Wi-Fi Protected Access (WPA), which help protect your wireless network. For most routers, you will provide a passphrase that your router uses to generate several keys. Make sure your passphrase is unique and long (you don't need to memorize it).
     
  3. Your administrative password, which controls your wireless network. Just like any other password, it should not be a word that you can find in the dictionary, and it should be a combination of letters, numbers, and symbols. Be sure you can remember this password, because you'll need it if you ever have to change your router's settings.
     
  The exact steps you follow to configure these settings will vary depending on the type of router you have. After each configuration setting, be sure to click Save Settings, Apply, or OK to save your changes.
  Now, you should disconnect the network cable from your computer.
  4. Connect your computers to the wireless network
  • Windows 7
    
  • Windows Vista
    
  If your computer does not have wireless network support built in, plug your network adapter into your USB port, and place the antenna on top of your computer (in the case of a desktop computer), or insert the network adapter into an empty PC card slot (in the case of a laptop). Windows will automatically detect the new adapter, and may prompt you to insert the CD that came with your adapter. The on-screen instructions will guide you through the configuration process.
  

what you have a is usb wireless network adapter, which is a device that allows you to connect a usb enabled computer (laptop/desktop) to a wireless router (access point) so you can got connect to a network or go online if your router is set up for it.

you would usually need a driver for your computer to recognize and work with this device. the driver usually comes on a cd with the unit. you would usually insert the cd and follow the instructions, or you would usually also install the drive and then connect the device.

hope that helps.

The adaptor would go into a free USB port on your computer. The wireless adaptor would then need to connect to a wireless router.