Advise on: LOCKDOWN\iexplore.exe

My guess is that the following Spybot S&D result refers to a program that locks down the home page so it cannot be changed by a hijacker. Please tell me if I am correct or if this should be fixed.
WinXP Media Center
Thank you.
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Microsoft.Windows.Security.InternetExplorer: [SBI $A3433CBF] Settings (Registry change, nothing done)
HKEY_USERS\S-1-5-21-1133832929-1776878147-3642771259-1009\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_LOCALMACHINE_LOCKDOWN\iexplore.exe

karma:

Fix it unless you intentionally overrode the default setting for a problem such as this:

• Pictures do not appear as expected, or you receive an error message when you open an HTML file on a Windows XP Service Pack 2-based computer
  http://support.microsoft.com/kb/878461

For more information on the LOCALMACHINE_LOCKDOWN detection see.

• Unclear result from S&D.
  http://forums.spybot.info/showthread.php?t=27805

As far as I know, a "0" behind that value hides your Computer throughout your LAN or every LAN. So this could be a Setting made by another Security-Program like any Internet-Protection by Norton or something. If you want to see your machine in your Network, clean this entry; if you want to be invisible, leave it, as it is.

Greetings