hi!my avast antivirus has found some tojans and got rid of them.But when i connect into the internet(i have a dial up connection) after 6-7 minutes i cannot download nothing and my downloading stops or drammatically slows down .I continue to have a connectin but nothing seems to move on.I have windows xp (home) sp2 installed and use zonealalm firewall.Can you help me?
Let’s start with making sure your system is clean from any malware. Click on the link in my signature and follow the malware removal instructions. Don’t rush, take your time and when finished let us know how it is going.
Better slow and safe than fast and infected 
By the way, “vythos” means “bottom of the sea/lake” in greek. Are you greek? [A little off-topic, I know ;D]