1. In WindowsXP, click Start/Control Panel/Performance and Maintenance/System; In Windows2003, click Start/Control Panel/System.
2. Click the Hardware tab, and then click the driver signature button.
3. In "What do you want Windows to do?" , click Ignore-Install Software Without My Permission to allow all device drivers to be installed on this computer, whether they are digitally signed or not.
4. Under System Administrator Options, select the "Make this operation the system default" check box to make the selected setting the default for all users who log on to this computer.
5. Click the OK button. Of course, the above operation requires you to log on to Windows as an administrator or a member of the administrators group, otherwise the options of "Ignore-Install the software without my permission" and "Apply this operation as the system default" will not be available.