Activate firewall

How to stop XP programs running in the background. I am trying to activate firewall (Ontrack SystemSuite version 4.0) but win XP wouldn’t let me. I know it works with win XP because I used it before but I don’t know why it would not let me this time. I need some help. I keep getting message saying the background task server has encountered a problem.
Thank you to all

  vinnyo123 17:49 25 Apr 03

try turning off the internal firwwall win xp has,

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