CHIPSET:
From my experience if there are smsbus (with yellow mark) on device manager you need to install chipset driver. If there are not i think it not necessarily install:
Download (direct)
Download (HP)
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GRAPHIC:
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If you have Intel Graphic:
Mobile Intel 45 Express Chipset Family Graphics Driver
Download (direct)
Download (HP)
If you have Nvidia:
Nvidia GeForce G 105M/103M
Download (direct)
Download (HP)
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AUDIO:
IDT High-Definition Audio CODEC Driver
Download (sp45211)
If it didn't work use below:
Download (SP41616)
HP Quicklaunch Button
Download (direct)
Download (HP)
ALPS Pointing Device Driver (2- and 4-Way) for 14-Inch Wide LCD
Download (direct)
Download (HP)
LSI High-Definition Audio (HDA) Modem
Download (direct)
Download (HP)
HP Wireless Assistant
Download (direct)
Download (HP)
Realtek RTL8102E/8111C Family PCI-E Gigabit Ethernet NIC Driver
Download (direct)
Download (HP)
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WIRELESS:
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There are two wireless driver here, choose base on your specs, if you don't know just download both and see which works. (testing this drivers will not harm the system).
After Windows Vista installation if you can connect to the wireless network no need to download these wireless drivers.
Intel PRO/Wireless Drivers for Microsoft Windows Vista
Download (direct)
Download (HP)
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Broadcom Wireless LAN Driver for Microsoft Windows Vista
Download (direct)
Download (HP)
JMB38X MS SD SD/MMC xD Card Reader Driver
Download (direct)
Download (HP)
Essential System Updates for Microsoft Windows Vista Service Pack 1 (SP1)
Download (direct)
Download (HP)
Cyberlink YouCam Software
Download (direct)
Download (HP)
Lightscribe System Software
Download (direct)
Download (HP)