HP Pavilion dv4z Notebooks-Quick Launch - Version 6.50.12.1 HP Notebooks - Pavilion dv4z 1000 Notebook Quick Launch Driver Download – This download enables the Pavilion dv4z 1000 Notebooks Quick Launch Buttons on the keyboard to be programmed for the supported Notebooks and Operating System. Menu control of various bezel buttons such as; volume, internal display, external display, mute as well as other Hotkeys that this Notebook contains. This driver works on Microsoft XP, Vista, and Windows 7 operating systems on Pavilion dv4z Notebooks.The driver update now detects the presence of WWAN when the notebook/laptop is in Tablet mode, and supports either two or four screen orientations, depending on the WWAN status. This update was made to orient the wireless antennae away from the user.This Driver download supports:» HP Pavilion dv4z-1000 CTO Entertainment PC Notebooks» HP Pavilion dv4z-1100 CTO Entertainment PC Notebooks » HP Pavilion dv4z-1200 CTO Entertainment PC Notebooks