Restoring Previous ControlSet After Using LastKnownGood

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WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.

To change the Registry to boot to a different CurrentControlSet, perform the following procedure:

1. Boot into Windows NT and run the Registry Editor (Regedt32.exe).
2. Go to HKEY_LOCAL_MACHINE/SYSTEM/Select, which will display the following parameters (your data field may vary depending on the ControlSet being used):
   
   

   Current:REG_DWORD:0x3
   Default:REG_DWORD:0x3
   Failed:REG_DWORD:1
   LastKnownGood:REG_DWORD:0x2

3. Look in ControlSet001 through ControlSet003 to find the ControlSet that should be restored.
4. Change the data in the following Registry key:
   
   Current:REG_DWORD:0x3 and Default:REG_DWORD:0
   
   to the appropriate ControlSet. For Example:
   
   Current:REG_DWORD:0x1
   Default:REG_DWORD:0x1
5. Change the LastKnownGood:REG_DWORD:0x2 to the previous Current data. For example:
   
   

   LastKnownGood:REG_DWORD:0x3

6. Exit Regedt32 and reboot the server.
   
   NOTE: If the server fails during reboot, use the LastKnownGood configuration to get back to the previous setting and Registry options.