Boot.ini tab is missing in MSCONFIG?

When you start MSCONFIG.EXE (System Configuration utility), the BOOT.INI tab which usually appears, may be missing.
This may simply be a file permissions issue. You can verify that by typing C:\Boot.ini in Start, Run dialog. If you get Access Denied or similar error, that explains the problem.
Here is another obscure possibility:
• Open Regedit and navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\MSConfig
• Backup the key by exporting it to a REG file
• In the right-pane, delete the value named Boot.ini (if found)
• Close Registry Editor and open MSCONFIG.