HP Compaq 6515b Windows XP Driver

CHIPSET
Infineon Trusted Platform Module (TPM) Driver
Download : ftp://ftp.hp.com/pub/softpaq/sp40001-40500/sp40431.exe

ALso recomended install you AMD processor update:
AMD Processor Update for Microsoft Windows XP
Download

GRAPHIC:
ATI Video Driver and Control Panel for Microsoft Windows XP
ftp://ftp.hp.com/pub/softpaq/sp38501-39000/sp38780.exe

AUDIO
For audio driver, you need to follow this step to install the Driver:

1. Install MS-UAA and restart after installation.
Microsoft Universal Audio Architecture (UAA) Bus Driver for High Definition Audio (sp33867)
Download
The file maybe too big (54mb) , alternatively you may try MS-UAA (KB888111), i don't test it yet but i think it will work
Download (KB888111)

2. After resatrt install you audio driver:
ADI SoundMAX High-Definition (HD) Audio Driver for Microsoft Windows XP/2000
Download

MODEM
Modem Driver Installer for Microsoft Windows XP (32-bit)
Download

WIRELESS:
You may have to choose which wireless you use,
Ralink 802.11 b/g/n WiFi Adapter: Download
Broadcom Wireless LAN Driver: Download
HP WWAN Broadband Wireless Drivers: Download
Intel 82566MM NIC Driver for Microsoft Windows XP: Download

CARD READER:
SCRxxx PCMCIA Smart Card Reader Driver
Download

ETHERNET/LAN:
Ethernet Driver
Download

BLUETOOTH:
Software Support for HP Integrated Module with Bluetooth Wireless Technology
Download

INPUT DEVICES:
HP Quick Launch Buttons: Download
Synaptics TouchPad Driver: Download
Authentec Fingerprint Driver: Download
HP Bluetooth PC Card Mouse Driver: Download

TOOLS: HP Battery Check Download