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Managing Hardware Devices and Drivers
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Troubleshooting Lab
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The Windows Server 2003 installation CD includes drivers needed to configure many of the latest PnP hardware devices, and misconfiguration of such devices is very rare. Misconfiguration is more likely for earlier, non-PnP devices, which often require manual resolution of resource conflicts. Problems can also be encountered with vendorsupplied drivers that Microsoft has not tested and verified. The Last Known Good Configuration rolls back the CurrentControlSet key of the registry, which contains device configuration, to a copy of the key that was in use the last time the system was successfully logged on to. When a device configuration change causes the computer to fail on restart, and assuming that logon has not been successful, the Last Known Good Configuration is an effective troubleshooting option. If logon is successful following the problematic configuration, the Last Known Good Configuration is replaced with the current configuration, and the Last Known Good Configuration is no longer a helpful tool to troubleshoot a subsequent failure of the device. In that event, or if the computer simply will not start successfully, the Safe mode is the next step for troubleshooting. In Safe mode, the system loads only a minimal set of drivers. You will usually be able to log on in Safe mode and configure, disable, or remove malfunctioning devices and drivers. In this lab, you will use the Last Known Good Configuration and Safe mode startup options. 1. Restart your computer. 2. As the computer is starting up, press F8. 3. Select the Last Known Good Configuration. At this point, all device configuration changes made since the last restart and logon have reverted to their state prior to that logon. 4. Restart your computer. 5. As the computer is starting up, press F8. 6. Select Safe mode. 7. Log on to the computer and then open Device Manager. You can now configure devices, including their drivers and startup state (enabled/ disabled). The changes you make will be in effect the next time you start the system in normal mode.
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You must have administrative privileges on a computer to install non-PnP devices and their drivers. PnP devices that have signed drivers on the Windows Server 2003 distribution CD will configure automatically, requiring no user intervention. Users are able to install PnP devices if the driver is present on the system and requires no user interaction. If a driver needs to be added to the computer or any additional configuration or input is necessary during driver installation, users will not be able to install the device. In such cases only administrators can install the device. Device Manager will indicate, with one of several types of icons, any devices that cannot be configured due to problems with hardware identification, driver installation, or resource conflicts. Updated drivers can be rolled back to the previously used driver with the Roll Back Driver function of Device Manager. You can enable or disable devices through Device Manager. You can uninstall a PnP device and then reactivate the device by choosing Scan For Hardware Changes.
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Before taking the exam, review the key points and terms that are presented below to help you identify topics you need to review. Return to the lessons for additional practice and review the Further Readings sections in Part 2 for pointers to more information about topics covered by the exam objectives.
Key Points
Review the use of Device Manager to install device drivers, update device drivers, roll back device drivers, remove drivers, and disable or enable devices in a hardware profile. Remember that Device Manager can change settings only on a local system remote use of Device Manager is limited to read-only mode. Users can install PnP devices only with signed drivers that are already present and require no user interaction. Administrative credentials are required to install non-PnP and unsigned or vendorsupplied PnP drivers. In troubleshooting scenarios, updating or reinstalling a driver is needed unless a resource conflict is being resolved.
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