NOTE: Install according to order given
First Install  Netframework:
Net framework 2.0
Download
Compaq  Presario CQ40-117TUBUTTON Driver
HP  Quick Launch Buttons
Download
INTEL CHIPSET:
Compaq  Presario CQ40-117TUCHIPSET Driver (xp, vista, 7)
INF Update  Utility - Primarily for Intel® 5, 4, 3, 900 Series Chipsets
Download  (intel website)
Download(mediafire)
(optional  Install)
Intel matrix storage manager:
Download  (intel site)
Download  (mediafire)
GRAPHIC
Compaq Presario CQ40-117TU Graphic XP Driver 
if you have intel graphic:
Mobile Intel  45 Express Chipset Family Graphics Driver
Intel graphic  accelerator 4500MHD
Download
If  you have Nvidia graphic:
NVIDIA GeForce G 103M/ G 105M Graphics  Driver (186.81 WHQL XP 32-bit)
Download
FOR NVDIA: if  resulting in error use modded driver below:
Download
3-step  process to install:
1. Download driver, double click and select  extract,
2. Download modded INF and replace original INF in  extracted folder,
3. Install and  reboot. 
======================================
AUDIO:
Compaq  Presario CQ40-117TUWindows XP Driver 
=====================================  
Install MS-UAA first:
both ms-uaa sp33867 and kb888111 are  similar files.
Windows XP SP2: Download   (SP33867.exe)
Download  (KB888111)
Windows XP SP3: Download  (KB835221)
Then restart, and install AUDIO Drivers:
IDT  - High Definition Audio Codecs (SP39671)
Download  (ftp)
Download  (mediafire)
===========================
or try this drivers reported work in xp
SP41500 Download  (ftp)
Download  (mediaifre)
SP41616  Download(ftp)
Download  (mediaifre)
===========================
First install your audio.
Installing the Audio normally resulting in error, ignore it and proceed  by manually install the drivers, read the guide here;
Manually  install Audio Drivers. 
Download and install the driver, you will get the error while  installing.
Perform the below steps to fix the issue.
1. Click on Start and select Run. Now type devmgmt.msc and press enter.
2. Right click on "Audio device on High Definition Audio Bus" and click  Update driver.
3. Select "Install from a list or specific location".
4. Click Next. Then select "Don't search, I will choose the driver to  install".
5. Click Next and then select "Sound, video and game controller" from  the list.
6. Click Next and then click Have Disk.
7. Click Browse C:\swsetup\sp39671 folder and select the .inf   file and click open and Continue with the onscreen instructions. 
Manually  install Audio Drivers.
High-Definition Audio (HDA)  Modem Installer and Driver
Download
WIRELESS:
Compaq  Presario CQ40-117TUWireless XP Driver 
=====================================
Choose  one of the wireless driver base on your specs, if you dont know, just  try each driver (there are no risk and will not harm your system)
---------------------------------------------------------
Broadcom:  Download
if  error try newer version -
Broadcom BCM9431HMG
Broadcom: Download
Intel:  Download
(requires  windows installer 3.0 installed first)
=================
BLUETOOTH:
Compaq  Presario CQ40-117TUXP Bluetooth Driver
HP Integrated Module with  Bluetooth Wireless Technology
Download
WIRELESS  SOFTWARE
HP Wireless Assitant:
Download
ETHERNET:
Compaq  Presario CQ40-117TULAN/Ethernet Driver
Realtek RTL8102E Family  PCI-E Fast Ethernet NIC
  Download(direct)  or Download
CARD  READER
Compaq Presario CQ40-117TUCard Reader Driver 
JMB38X  Card Reader Host Controller
Download
Compaq  Presario CQ40-117TUTouchpad Driver
ALPS Touchpad
Download
Synaptics  Touchpad 
Download
Download 
WEBCAM
Compaq  Presario CQ40-117TUXP Webcam Driver 
Cyberlink youcam software  2.0
Download
LIGHTSCRIBE:
Lightscribe  system software
Download
If  you have 7 unknown device:
Unknown devices:
Download
Unzip  files, open folder and right click at machine.inf, select install.