The following describes the command-line switches you can use when you run the MS-DOS version (Scanreg.exe) or the Windows version (Scanregw.exe) of the Registry Checker tool.

• MS-DOS Version:

  Scanreg.exe [/backup] [/restore] ["/comment=text"] [/fix] Scanreg.exe [backup] [/restore] ["/comment=text"] [/fix] [/opt]

• Windows Version:

  Scanregw.exe [/backup] ["/comment=text"] [/autoscan] [/scanonly] [filename]

The following table lists each command-line switch and its description:

Switch	Description
/backup	Backs up the registry and related files without displaying any prompts.
/restore	Displays a list of available backup files, sorted by the date and time the backup was created.
"/comment=text"	Enables you to add a descriptive comment to the registry backup.
/fix	Repairs any damaged portions of the registry, and optimizes it by rebuilding it without unused space.
/autoscan	Automatically scans the registry and backs it up without displaying any prompts if there is no backup for that date.
/scanonly	Scans the registry and displays a message if any errors are found. This switch does not back up the registry.
filename	Scans the registry file specified and displays a message indicating whether or not any errors were found. This switch does not back up the registry.
/opt	The /opt command-line switch causes the Registry Checker tool to optimize the registry by removing unused space.

The Registry Scan Results dialog box appears only when you use the Scanregw.exe command without any command-line switches.

If no registry errors are found when you run Scanregw.exe, you are prompted to create a backup copy of your current registry. >/p>

The "/comment=text" switch can be used by itself or with the /backup switch. For example, you can type either of the following lines at a command prompt:

scanreg.exe "/comment=this is a registry backup"
scanreg.exe /backup "/comment=this is a registry backup"

For additional information about how to use the Registry Checker tool,

1. Click Start, click Help, click the Index tab,
2. Type registry, and then double-click the "Registry Checker" topic.

The above information applies to:

• Microsoft Windows 98
• Microsoft Windows Millennium Edition