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I always need to keep my PC on to do some calculation. I have an experience which people hack into my PC during late evening. I want to stop all internet activity to reduce the risk. Basically I can disconnect my internet cable. However, I don't want to do it every single day. I would like to use software to stop internet.

If I use software to stop internet, does it as safe as remove my internet cable?

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what's you Operating System? –  CSᵠ Jan 6 '13 at 0:58
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If you use some software or disable by software, your network board would not communicate over the wire so yes, it's as safe as removing the cable for this reason.

Even easier would be to disable your network interface or connection.

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thanks for your answer. I learned something new today –  Marco Jan 6 '13 at 4:53
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