Connect another laptop using Vista operation system to my wireless network

you must download it from net or use window vista to reformat it

You need to download the drivers from the Compaq/HP WEB support/download page. Make sure you select your model laptop and the XP or Vista Windows version of the drivers you require and install them. Use this link to download the drivers: -
http://h18000.www1.hp.com/cpq-country/cpq_support.html

Did this laptop originally come with Vista installed, and you downgraded to XP?
No?
Did you install XP from a full Installation disk you bought?
The reason I ask this, is it shows Windows Vista as the original operating system.

I found, as you did that there is no LAN driver available from HP Support, except for Windows Vista. (Broadcom Wireless)

I suggest this:

Contact HP.
I would call them. Much nicer speaking to a real person, and faster than emailing them.

Here is the phone information page,

http://welcome.hp.com/country/us/en/contact/phone_assist.html#section1

(Product Name is Presario)
Phone number is 1-800-474-6836

I just called the above 1-800 number, to verify it was still a good working number, and to talk to tech support myself, about what is involved for you to obtain this disk, and if said disk was available for THIS laptop using the Windows XP operating system.
(Apologize for the run-on sentence)
(9:37PM, Thursday, Sept. 17)

[1.Get Tech Support
2.Notebook PC
3.Presario
Wait for tech support. Time I incurred? 3 minutes waiting time]

You'll have to call tech support yourself, so that you can give them THE serial number. At that time, the tech will verify whether drivers are available for LAN, for the Compaq Presario F572US laptop. Then a Restoration Disk will be offered as an option.

Tell them you need the Restoration Disk for your Compaq Presario F572US laptop, running Windows XP.

Tell them the Serial Number, (s/n in the white Service Tag), and the Operating System, (Windows XP)

(Sometimes you have to remind them of the operating system, to be sure there isn't mis-communication, and they send you a Restoration Disk for Vista)

The Restoration Disk is free. The Shipping and Handling is not. The prices are $17 for a 5 to 7 day ship, $24 for a 2 to 3 day ship.
(Including Tax)
They have an overnight option also.

Have you checked that the wireless network connection is not disabled in "control panel" "network connections". Also check Device Manager and make sure that the wireless device is listed under network adapters. Have you turned off the wireless device in the bios? If you need help with any of these let me know. I will also need to know which operating system you are using i.e. XP or Vista

buy a wireless device

make shoure your wireless account has been activated or finish or the contact person who mange your wireless administration

Here is the link for your wireless drivers. Just run the file and when Vista asks for permission just click on 'Allow'. You may have to restart before the wireless installation completes. If you need more help then post what wireless network or router you are trying to connect if you are using or if you are going to connect to a 'hot spot' like a Starbucks or hotel. Good luck, Steve
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-56504-1&lc=en&dlc=en&cc=uk&lang=en&os=2093&product=3559331

Your network profile is damage create a new one, once the profile get corrupted it will never allow to connect to any outside networks due to security measure.

Hothawk

Do you have the full model number? So I can check what kind of driver you have?

Also whic operating system you use? Windows XP? ... 2000?

Vista?

http://www.2wire.com/bandwidth/results.php?kbps=468.3&downloadtime=9.687&KB=553.75&recorded=1

http://www.dlink.com/products/category.asp?cid=1