C:\WINDOWS>SCHTASKS /CHANGE /?

SCHTASKS /Change [/S system [/U username [/P password]]] /TN taskname

Description:
   Changes the program to run, or user account and password used
   by a scheduled task.

Parameter List:
   /S       system           Specifies the remote system to connect to.

   /U       username         Specifies the user context under
                             which the command should execute.

   /P       password         Specifies the password for the given
                             user context.

   /RU      username         Changes the user name (user context) under
                             which the scheduled task has to run.
                             For the system account, valid values are
                             "", "NT AUTHORITY\SYSTEM" or "SYSTEM".

   /RP      password         Specifies a new password for the existing
                             user context or the password for a new
                             user account. Password will not effect for
                             the system account.

   /TR      taskrun          Specifies a new program that the scheduled
                             task runs. Type the path and file name of
                             the program.

   /TN      taskname         Specifies which scheduled task to change.

   /?                        Displays this help/usage.

Examples:
   SCHTASKS /Change /RP password /TN "Backup and Restore"
   SCHTASKS /Change /TR restore.exe /TN "Start Restore"
   SCHTASKS /Change /S system /U user /P password /RU newuser
            /TN "Start Backup"



C:\WINDOWS>SETVER /?
Sets the version number that MS-DOS reports to a program.

Display current version table:  SETVER [drive:path]
Add entry:                      SETVER [drive:path] filename n.nn
Delete entry:                   SETVER [drive:path] filename /DELETE [/QUIET]

 [drive:path]    Specifies location of the SETVER.EXE file.
 filename        Specifies the filename of the program.
 n.nn            Specifies the MS-DOS version to be reported to the program.
 /DELETE or /D   Deletes the version-table entry for the specified program.
 /QUIET          Hides the message typically displayed during deletion of
                 version-table entry.



C:\WINDOWS>SFC /?

Microsoft(R) Windows XP Windows File Checker Version 5.1
(C) 1999-2000 Microsoft Corp. All rights reserved

Scans all protected system files and replaces incorrect versions with correct
Microsoft versions.

SFC [/SCANNOW] [/SCANONCE] [/SCANBOOT] [/REVERT] [/PURGECACHE] [/CACHESIZE=x]


/SCANNOW        Scans all protected system files immediately.
/SCANONCE       Scans all protected system files once at the next boot.
/SCANBOOT       Scans all protected system files at every boot.
/REVERT         Return scan to default setting.
/PURGECACHE     Purges the file cache.
/CACHESIZE=x    Sets the file cache size.