While simply plugging in the device and letting Windows 7 or Vista install the driver automatically is cool, you may for some reason prefer to not have the Driver installed automatically. You can if you wish, stop windows from installing the drivers automatically.
To do do, open Contriol panel > Advanced System settings > hardware tab > Device Installation settings.
You can also access it by opening Control Panel > Device & printers > Right Click the Computer under Devices and select Device Installation settings.
Here select No, let me choose what to do. Click Save changes.
Alternatively you can also do the following.
Type gpedit.msc in start search and hit Enter to open Group Policy Editor.
Navigate to Computer Configuration > Administrative Templates > System > Device Installation > Device Installation.
Now in the RHS pane double click on Prevent Installation of Devices not described by other policy settings.
Set it at Enabled. Click Apply / OK.