I wish to restore the factory settings for my Zyxel router

Use reset button.

I do not know what is your router type. Therefore I put here more options. Select what is valid for you:

• Linksys

Linksys Official Support Resetting your router and changing the router...

• TP-Link

How to reset TP LINK products to factory defaults

• Netgear

Restoring NETGEAR home router to the factory default settings Answer...

• Zyxel

wish to restore the factory settings for my Zyxel router
or
ZyXEL PK5001Z Factory Reset

• Asus

How to Reset the Asus RT N66R
or
How to Reset the Asus WL 500g

• D-Link

http://blog.dlink.com/what-is-a-reset-button-when-should-i-use-it
or
http://www.dlink.com/uk/en/support/faq/modems/dsl-modems/dsl-series/how-do-i-reset-my-adsl-router-back-to-factory-default-settings

• Belkin

Resetting the Belkin router to factory default settings using the Reset...

You should restore the Factory Defaults to get full access to the router. Be aware that all custom settings will be undone with this procedure.
This can be achieved this way:

* Choose menu "System Tools ? Factory Defaults", and you can restore the configurations of the Router to factory defaults on the following screen
* Click the Restore button to reset all configuration settings to their default values.
* The default User Name: admin
* The default Password: admin
* The default IP Address: 192.168.1.1

Best option is to log into the router and make a new one.

Plug the router into your computer using ethernet.

Open interent exploer and type into the address bar http://192.168.1.1
Username: admin
Password: 1234

This may be of some help to you

http://www.zyxel.co.uk/upload/doc/NBG334W%20User%20Guide.pdf

The manual does not show a user id when the device has been factory reset. It only sets the password to 1234.

Your wife's laptop is setup to connect to another wireless network. It must be set up now for the wireless network that you are trying to connect to. This means that your wife's laptop is trying to connect to the wireless network somewhere else. You need to let the laptop look for available wireless networks. It should be able to see your wireless network. It will then require you to enter the password that you have set in your Zyxel. If you don't know the password, call Zyxel.

Had the same problem connecting zyxel NGB334W to XBox 360. Other computers and devices would see the SSID but the XBox 360 would not. I had no luck talking to the techs at zyxel, they said it was incompatible with the wireless XBox device. Good news!!! This can be resolved. I went into the setup (192.168.1.1) / Wireless Lan / Advanced / Wireless Advanced Setup. Under the 802.11 mode set to 802.11b. Factory is 802.11b/g and this was not seen. Hope this helps you out.

Hi

To configure the wireless router it is recommended the it is connected directly to router.
Please follow these steps to fix your issue

1. Reset the router using reset button on the back of the NBG334W router
2. Configure or change the laptop ehternet adaptor setting to "Obtain IP address automatically.
3 connect laptop and router using ethernet cable. check the ip address using ipconfig command in DOS prompt. If IP address is 0.0.0.0 or 169.X..X..X run command
ipconfig /release
ipconfig/ renew

best way restart the computer

4. if you still have issue in getting ip address double check ethernet cable and try reseting the router again.

5. Still problem persist install new firmware on the router. you can download router firmware from
http://www.zyxel.com/web/support_download_list.php?indexflag=20040906164737&ModelIndexflags=0,420070320142921

Please vote if this information is helpful in resolving your issue

To access Zyxel configuration/setup utility, launch a web browser (Internet Explorer, Opera, Firefox, or Netscape, etc.) on your computer, type in http://192.168.1.1 (default IP address for most Zyxel wireless devices) in your Internet browser's Location/Address bar, and then press Enter on your keyboard. 
If presented with a user authentication (login) screen, try the following:

Default Username - Zyxel Wireless Router: N/A (none, leave blank)
Default Password - Zyxel Wireless Router : 1234 

If you cannot login using the above, verify that (a) you are entering your password correctly, and that (b) your CAPSLOCK key is off. It could also be due to the firmware (a set of instructions stored on an EEPROM microchip) on your Zyxel product being corrupt. If so, you would need to reset your Zyxel WiFi router to its factory default settings.

IMPORTANT: Do not forget to promptly secure your Zyxel router (using a strong password, a non-obvious WEP Key, etc.) following a reset to factory default settings. Failing to do so may potentially expose your entire WLAN to scammers.

*Your vote is highly appreciated. Thanks in advance.

1 Install your software that came for NBG wireless cable router CARD DRIVERS.

2 Now INSERT your NBG wireless cable router CARD in your PC

3 Window will say found new hardware.

4 Now Insert your router DISK and open your Internet Explorer

5 You should have your default ROUTER IP ADDRESS

YOU MIGHT HAVE TO SIGN IN OR PROVIDE PASSWORD

um is it compatible with vista and/or upgradable?