Can I use networking between the two computer, the one computer has the operating system which is windows XP while the other computer has the operating system which is the windows 7?

may be your xp operating system is corrupted or the wireless device is not functioning properly. first check your wireless device with another computer of your friend. if that works fine there be sure it is yous operating system problem. find a fresh copy of windows xp. and format your computer. after formatting i m sure it will work fine. for the good performance by your computer always defragment drives. also try installing the the third party softwares other than c: drive. this will make your windows work smoothly. thanks.

mind

What OS are you running? XP? Most wireless networks are now using the WPA protocol and computers with XP that are not updated at least to SP2 will not connect to these networks even though you can see them available. I would go ahead and updated to the latest SP3 (Service Pack 3). I cant really be more helpful without knowing the OS (operating system).

when you change the wireless security on the router , it is recommended tht you will change the wireless network name also ( SSID ). Because when you try to connect to the wireless network on the computer, your computer will try to connect to the same old network name with the old wireless security settings. To avoid this you can change the wireless network name. WPA is supported by windows XP SP2 and above operating system.
If the operating system on your computer WINDOWS XP SP1 and if you are trying to connect using the windows utility then you would not be able to connect to the network .

Click Here for more information about the routers and networking

I do not believe that updating the driver for your network card will solve the problem, although you should always install the newest one for best operation. You can go to Compaq's support page here and see if there is an update available for your model.

If WEP worked for you and WPA doesn't, then it is an encryption problem. Encryption happens on a different layer than the driver, which simply makes your Operating System work with your hardware.

If you are running Windows XP SP1 or SP2, update the operating system to XP Service Pack 3 for best WPA/WPA2 support.

XP Service Pack 1 computers do not support WPA by default and cannot support WPA2. To upgrade an XP SP1 computer to support WPA (but not WPA2), either

• install the "Windows XP Support Patch for Wi-Fi Protected Access" (link) from Microsoft, or
• upgrade the computer to XP SP2

XP Service Pack 2 computers by default support WPA but not WPA2. To upgrade an XP SP2 computer to also support WPA2, install the "Wireless Client Update for Windows XP SP2" (link) from Microsoft.

If you have any more questions, just come back here and leave a comment - I'm happy to help.

Here's a great link to XP networking solutions that might help you answer your question...
Windows XP Networking
I hope that leads you in the right direction toward a resolution to this issue...

You need to install the network driver.
Go to the ASUS WEB site to download the network driver for your computer. Download the Windows XP make sure it is for your model computer.

http://support.asus.com/download/download.aspx?SLanguage=en-us

Does this computer see the other two computers and do they see this computer?

go to you tube.com
type there
how to install
that way you can easily install

Windows 2000 , windows xp, and Windows NT are network operating system, they support networking b/w the computer.
The windows 1998 not supporting networking.

The concept remote login is established in windows xp, not in rest.