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You have a computer on which Microsoft Windows XP with Service Pack 2 (SP2) is installed on the main partition. On this computer, you install Windows Vista on a different partition. Then, you try to use the System Configuration Utility (Msconfig.exe) in Windows Vista to remove or change the Windows XP startup option. However, the option is unavailable. You expect the option to be available on the Boot tab of the utility.
This problem does not occur if you install Windows Vista on both partitions.
To resolve this problem, use one of the following methods.
Method 1: Use the System Properties dialog boxTo use the System Properties dialog box to configure Windows Vista as the default operating system, follow these steps:
Method 2: Use the Boot Configuration Data EditorTo prevent the operating system selection menu from appearing when you start the computer, you can use the Boot Configuration Data Editor (Bcdedit.exe) to remove the Windows XP startup option. To do this, follow these steps:
The Boot Configuration Data Editor modifies the boot configuration data (BCD) store. The BCD store contains boot configuration parameters. The BCD store also controls how the operating system is loaded. You can use the Bcdedit.exe command-line tool to take the following actions on entries in the BCD store:
In BIOS-based operating systems before Windows Vista, these parameters were in the Boot.ini file. In operating systems that were based on the Extensible Firmware Interface before Windows Vista, these parameters were in the nonvolatile RAM (NVRAM) entries.
For more information about the Boot Configuration Data Editor, visit the following Microsoft Web site: