Sometimes it's handy to have a scheduled task do something in Windows XP. I use a couple for different reasons. One is to do a weekly backup of data from one disk to another, and the other is to do a daily grab of the TV guide from IceTV to process and deliver to my Topfield PVR. Annoyingly, but probably appropriately, XP doesn't let you run scheduled tasks by default without a password set on the user account. This is described in Microsoft knowledge base article 310715.
Instead of creating a password for my login at home, and instead of creating a 'dummy' account with a password just for scheduled tasks, I found this: Scheduled Tasks - Running Tasks Without A Password.
For XP 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 XP 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)
Anyway, it works...