itunes manager tools

The programs do not connect to Internet …?
Hello everyone … k I installed and uninstalled Kaspersky antivirus 2010 and since then many of the programs are not connected to the Internet, which connects before I installed kaspersky. Now I have AVG Free and have checked the firewall settings .. no effect, are removed manually Kaspersky registry entries, has implemented several registry cleaners … and this morning I even repair windows xp installed, and even programs like iTunes, download manager etc free not find server .. is there any tool which will check all ports and check if the settings are not allowing this software to connect? Please help as I do not want you to reinstall your operating system and all the software … Thanks in advance …
new versions of avg tend to block more, but usually before they are required to block a program, try Avira or not using a firewall, and if it doesn't work then your programs.
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