Command Center

winxp backs do not need a password. here is the over ride.

WIN_XP will allow you to work around the password requirement for windows scheduler. set up the backup task and schedule it for later as required.

once the task has been scheduled , go into the schedluer and selcet the properties under the newly created backup task. in the botom portion of the task properties, place this text in the run as cell.
nt authority\system

this will prompt for a password... do not enter a password, just click ok and yes on the no password warning.

right click the task and run it. it will run and you can reschedule it from the scheduler.

Scheduled Tasks - Applying/Running tasks without a password

For Pro:  Go to Start/Administrative Tools/'Local Security Policy/Security Settings\Local Policies\Security Options
Accounts: Limit local account use of blank passwords to console logon only. This is enabled by default, disable it.

For Home: (Keith Miller) Go to Start/Run/Regedit and navigate to this key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa

Value name: limitblankpassworduse, Type: REG_DWORD, Data: 0 (disabled) 1 (enabled)

For Home: Run Scheduled Task without a Password (Line 67)
http://www.kellys-korner-xp.com/xp_tweaks.htm