Bluetooth not support

See if you can activate the bluetooth hardware by clicking on the FN [Function Key] and the Wireless icon, this will enable to bluetooth device and toy can install the driver accordidingly

I assume you are attempting a "downgrade" to Xp from Vista, since this laptop does not come with XP.
From the Compaq information page:

1. HP does NOT support XP for consumer notebooks, so if you have any difficulties regarding XP, do not expect HP will help you.
2. HP may demand you to install back VISTA if you have hardware problem to troubleshoot it.
   An option to consider-put your original Vista hdd away and install new one for XP.
3. Some of the notebook features may not work in XP due to uncertified licenses pointed in this guide.
4. Microsoft has released three (3) Service Packs for XP, use only SP2 for the first trial. Why? Since many of XP drivers are released based on XP-SP2.
5. Always make Vista Recovery cd/dvd before downgrade to XP. see it here
6. You have a folder with drivers & programs that may prove very helpful after XP downgrade.
   Copy folder C:\Swsetup to DVD Before formatting your hdd.
7. If you have a pre-SP2 XP cd, get the full SP to Integrate with Nlite: SP2 Nlite HERE

The help guide for downgrading is here. There is a lot of information on this process written there.

However, if what you want is a an XP look and feel so you can compute the way you used to, change the Vista to look like XP in the display properties.
If you are trying to run non-Vista software, try running it in compatibility mode. To do this, right click on the program files and select properties and then locate compatibility..

for bios update go to manufacturers website but to install xp sp2 on this lappy you will have to install third party raid driver and legacy device driver that you can download from www.download .com

try to reinstall the drivers

Its true. the Bios or HDD driver wont allow you to install Win XP on it.. This BIOS is compatible with only Win Vista. The only easy way to do it is by creating 2 partitions while installing vista. once vista is installed- install XP with Dual boot and than format the vista partition.

Similar Problem already discussed here

They may be hit or miss using the Vista drivers for XP. I'll check around the web to see if they have any XP drivers for you, and post them back up.

Chris

Franc, was the bluetooth adapter working after upgrading from XP to Vista Basic?

It's Bluetooth driver may not be properly loaded. You may try these steps in reinstalling the driver.

1. Click Start , Control Panel , then Add or Remove Programs . You may also uninstall it from the Device Manager if you cannot find it on Add/Remove Programs.
   
2. From the list, Click Remove next to the Microsoft Bluetooth Drivers.
3. Once the drivers have been removed, click Start , Help and Support then Update Software & Drivers .
4. When prompted, click System Health Check . When presented with a listing of Updates for Driver, Bios and Software, select HP Bluetooth software .
5. Follow the prompts to install the software.

Source: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00300140&cc=us&lc=en&dlc=en&product=95516

Your Compaq came with Vista installed. Finding drivers for XP Pro with SP2 seem to be very troublesome. Somewhere HP Compaq has these drivers for you laptop. If you call them & they find out you bought XP Pro they will not support you in finding the proper drivers for XP Pro. How ever you can call & ask what it will cost for a recovery CD for XP Pro w/SP2.
Click the link to Compaq & listed is your laptop & what software & drivers are listed. If you need other drivers that are not listed, post what you want I'll try & find them for you. Please be as detailed as possible.
http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=228&lc=en&cc=us&dlc=en&product=3641194&lang=en
You may find some here.
http://search.hp.com/query.html?sh=1&charset=UTF-8&la=en&qt=drivers%20for%20XP%20A902TU%20Notebook

i have compaq 772TUlaptop
i formated my laptop bt now want to download d audio from net
hw to do