Scheduled Tasks - Running Tasks Without A Password
6 October 2005 by DanFor 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)
For Home: Run Scheduled Task without a Password (Line 67)
http://www.kellys-korner-xp.com/xp_tweaks.htm
Source:
Windows XP FAQ

24 April 2006, on 5:14 am
[...] 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 OptionsAccounts: Limit local account use of blank passwords to console logon only. This is enabled by default, disable it. [...]
27 July 2006, on 7:20 am
cool ... i will try it... tnx a lot!!! your the best..
5 August 2006, on 9:10 am
The XP Pro trick works great on XP Media with SP2 too - thanks.
However, I could not get the XP Pro solution to work on another machine without SP2. Is there more info on that?
John
7 August 2006, on 5:12 pm
Sorry, John. That's all the information I have.
16 November 2006, on 4:35 am
When Creating the task in scheduled tasks, set the user name as SYSTEM.
18 November 2006, on 3:14 pm
Thanks, but that did not work either. Funny thing, it no longer complains about "the scheduled task did not run because n user account password...". It does not complain at all, but does not run the batch program.
Thanks for trying,
1 March 2007, on 8:52 am
FYI, this makes remote desktop work without a password :O