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How to Troubleshoot Driver Problems
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Drivers are software features that Windows uses to communicate with hardware accessories . Windows typically has dozens of drivers active at any given point, allowing it to communicate with your graphics card, hard disks, sound card, USB devices, and other hardware . Without a driver, hardware cannot function properly . Additionally, you might have problems with hardware if a driver is outdated or unreliable . The following sections describe how to work with drivers to solve hardware problems .
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How to Find Updated Drivers
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Microsoft or hardware vendors occasionally release updated drivers to improve hardware performance and reliability . Many updates are available directly from Windows Update . To find and download any updates available for a computer, follow these steps:
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Click Start, click All Programs, and then click Windows Update . If available, click Check For Updates . If Windows Update displays any optional updates, click View Available Updates . Windows displays any driver updates if available . Select the update and then click Install . Windows Update downloads any selected updates, creates a system restore point, and then installs the updates .
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Additionally, hardware manufacturers might release updated drivers directly to users before they are available on Windows Update . Check manufacturer Web sites for updated drivers .
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How to Roll Back Drivers
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When you update a device driver, your computer might have problems that it did not have with the previous version . For example, installing an unsigned device driver might cause the device to malfunction or cause resource conflicts with other installed hardware . Installing faulty drivers might cause Stop errors that prevent the operating system from starting in normal mode . Typically, Stop message text displays the file name of the driver that causes the error . Windows provides a feature called Device Driver Roll Back that might help you restore system stability by rolling back a driver update .
note
You can use System Information or the Sigverif tool to determine whether a driver
on your computer is signed and to obtain other information about the driver, such as version, date, time, and manufacturer. This data, combined with information from the manufacturer s Web site, can help you decide whether to roll back or update a device driver.
To roll back a driver, follow these steps:
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Click Start, right-click Computer, and then select Manage . Under System Tools, click Device Manager . Expand a category (Network Adapters, for example) and then double-click a device . Click the Driver tab and then click Roll Back Driver . You are prompted to confirm that you want to overwrite the current driver . Click Yes to roll back the driver . The rollback process proceeds, or you are notified that an older driver is not available .
How to Use Driver Verifier
Windows 7 (and all versions of Windows since Microsoft Windows 2000) includes the Driver Verifier (Verifier .exe) . You can run either graphical or command-line versions of the Driver Verifier . To run a command-line version, open a command prompt and then type Verifier.exe . To run the graphical version, click Start, type Verifier.exe, and then press Enter . Driver Verifier is useful for isolating a problematic driver that is causing a computer running Windows to intermittently fail, because you can use the tool to configure Windows to actively test potentially problematic drivers . After driver verification has been configured for a driver, Windows puts additional stress on the driver during normal operations by simulating conditions that include low memory and verification of I/O . Enabling driver verification for a problematic driver is highly likely to initiate a Stop error that identifies the driver .
How to Troubleshoot Driver Problems
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To use Driver Verifier Manager to troubleshoot problems that might be related to a driver, enable driver verification for all drivers that might potentially be causing the problems . Restart the system and then wait . Driver verification happens in the background while the system performs normal tasks and might not yield immediate results . If a verified driver returns an inappropriate response, Driver Verifier will initiate a Stop error . If a Stop error has not occurred after several days, the verified drivers might not be the source of the problem you are troubleshooting . After you have completed the troubleshooting process, use Driver Verifier to delete the settings and disable driver verification .
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