Christian web host - Managing and Troubleshooting Hardware Using Signed Device Drivers
Managing and Troubleshooting Hardware Using Signed Device Drivers Speaking of new device drivers, Microsoft recommends that you use signed device drivers whenever possible. Signed device drivers have a digital signature that authenticates them as having passed extensive testing by the WHQL. The digital signature means that you can count on the device driver not to cause your system to crash or become unstable, and also that the device driver hasn t been tampered with by other installation programs or by a virus program. The assurances you get with digitally signed drivers aren t applicable to unsigned device drivers. When you install an unsigned driver, there is no guarantee that it has been tested, and if the driver is poorly written, it is much more likely to cause the operating system to freeze or the server to crash than any other program you ve installed. That said, there are times when you might have to use an unsigned device driver. In some situations, you might find that a particular device doesn t have a signed device driver. Here, you should check the manufacturer s Web site to see whether a signed driver is available because sometimes there is a signed driver, but it s just not distributed with the device or on the Windows Server 2003 distribution disks. If a signed driver isn t available, you might find that you have to use an unsigned driver. Keep in mind that Group Policy might prevent you from installing an unsigned driver. See the sidebar Managing Device Driver Settings Through Group Policy later in this chapter for details. Chapter 13 Note If you have to install an unsigned driver, proceed cautiously and remember to monitor the system closely. If you find that the system is inexplicably freezing or crashing, the unsigned driver is probably to blame and should be rolled back or uninstalled. Remember, any type of faulty driver can cause the system to fail, even a driver for a display adapter, a network adapter, or a sound card. Understanding and Changing Driver Installation Settings By default, Windows Server 2003 warns you when you try to install an unsigned device driver. If you don t want to see this prompt, you can change the driver- signing options to eliminate this warning, and you can also prevent any users from trying to install unsigned drivers. You can change driver settings by following these steps: 1 Start the System utility. In the Hardware tab, click Driver Signing. 2 In the Driver Signing Options dialog box, choose the action you want the Windows operating system to take whenever someone tries to install an unsigned device driver. The options are as follows: Ignore This option allows the user to install any unsigned driver without having to see and respond to a warning prompt. Part 4: Managing Windows Server 2003 Systems
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