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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, the 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 .
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You can use System Information or the Sigverif tool to determine whether a driver
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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.
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CHapTER 29 Configuring Startup and Troubleshooting Startup Issues
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To roll back a driver, follow these steps:
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Click Start, right-click Computer, and then click 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 else you are notified that an older driver is not available .
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How to Temporarily Disable a Service
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Many services automatically run at startup, but others are started only by users or by another process . When you troubleshoot startup issues that are related to system services, a useful technique is to simplify your computer configuration so that you can reduce system complexity and isolate operating system services . To decrease the number of variables, temporarily disable startup applications or services and re-enable them one at a time until you reproduce the problem . Always disable applications first before attempting to disable system services . The System Configuration utility allows you to disable system services individually or several at a time . To disable a service by using the System Configuration utility, follow these steps:
1. 2.
Click Start, type msconfig, and then press Enter . Do one of the following:
To disable all services, on the General tab, click Selective Startup and then clear the Load System Services check box . To disable specific services, on the Services tab, click to clear the check boxes that correspond to the items you want to disable . You can also click Disable All to disable all items .
If you change any startup setting by using the System Configuration utility, Windows prompts you to return to normal operations the next time you log on . The System Configuration Utility prompt will appear each time you log on until you restore the original startup settings by clicking Normal Startup under Startup Selection on the General tab . To change a startup setting permanently, use the Services console, change a Group Policy setting, or uninstall the software that added the service .
Troubleshooting Startup problems after Logon
If your computer fails immediately after a user logs on, use the process illustrated in Figure 29-13 to identify and disable the failing startup application to allow the user to log on successfully . If the problem occurs immediately after updating or installing an application, try uninstalling that application .
The Process of Troubleshooting Startup
CHapTER 29
Startup fails after logon
Does holding down the Shift key resolve the problem Yes Disable startup applications by using the System Configuration utility
Modify Group Policy to identify the problematic application
Once you identify the application, fix or uninstall it
FIgURE 29-13 Follow this process to troubleshoot startup problems that occur after logon .
How to Temporarily Disable Startup applications and processes
If a problem occurs after installing new software, you can temporarily disable or uninstall the application to verify that the application is the source of the problem . Problems with applications that run at startup can cause logon delays or even prevent you from completing Windows startup in normal mode . The following subsections provide techniques for temporarily disabling startup applications .
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