Last Known Good Configuration

If the system is unable to start up correctly after you have installed a new device or made a configuration change, this option should be the first tool you use. It will restore the HKEY_LOCAL_MACHINE\System\CurrentControlSet registry key to a copy of the one that was used during the last successful system startup. Note that this tool does not solve any issues with corrupt or missing driver files. To access this tool, perform the following steps:

1. Press F8 during startup when you see the Please select the operating system to start message. (Note: to see this you need to have a timeout value of greater than 0 set in the System Control Panel applet, under the Advanced tab, in the Startup/Recovery options.)

2. In the Windows Advanced Option Menu (as shown in Figure 3.25), select Last Known Good Configuration and press Enter.

Figure 3.25 Windows Advanced Options Menu

Figure 3.25 Windows Advanced Options Menu

After you are able to recover, you can then use Event Viewer, Device Manager, and/or System Information to identify any problematic devices.

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