i hope to noe how they manage to intrude into my system

novkhan,

My first comment/question -- is how do you know you computer has been compromised?

I have always heard the only way you can defend against something is to know it. If I was you I would first check my log files (if you have logs) and see if there is anything out of the ordinary.

As far as a firewall I would say definately Sygate! I use it and like it. There is a large amount of other tools able to be used.

I would go into explaining how someone can gain access but all the previous-posts have explained certain aspects. If you need anymore help or whatever PM me.


- Adiz

P.S. - What OS are you using?