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How to prevent a file from accessing the internet

How can I block internet access for a specific process on windows 7?

Note: The running process is not necessarily an installed software. And I don't know which specific ports it will be using.

For example: Installation process of a software.

What I want to achieve is to pick a process from Task Manager, and just block it from all internet activity.

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marked as duplicate by Mehper C. Palavuzlar, Sathya Sep 30 '11 at 9:50

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1 Answer 1

I believe what you want is a firewall and you have to set its defaults to disallow any outgoing connection unless explicitly allowed.

There's no easy way for a program to integrate with Task Manager, so you either have to answer a prompt given by the firewall when a program tries to access the net or use the firewall's built-in list of processes (if any).

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