http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01796879&lc=en&dlc=en&cc=us&lang=en&product=306892
==When you connect the USB cable to the product, and then to the computer, Windows 7 activates Windows Update. Windows Update searches online for the most recent product driver on the Windows Update site. If the online driver is more recent than the driver stored in Windows 7, the computer downloads and installs the updated driver.The Windows Update process takes place automatically. Therefore, you might not notice that the process is in progress.==