Shareaza

Hello,
I have problem with my Internet connection. After 3-5 minutes of downloading in Shareaza client, my Internet connection goes offline and everyone who is connected to my network (router/modem) lose their Internet connection too. But the Internet connection comes back. I do not know if the modem/router restarts or if it only starts the Internet connection again, but I get the connection back. Anyway, I have never has this problem before with the Internet connection about that it "drops". What can it depend on?

I had exactly the same issue with Pentagram router in the past (I do not remember its model). Flashing firmware from other (compatible) router helped. I do NOT advise you to do that, as you can brick your router if you do it incorrectly.

What's your router model?

I see you're not alone with this router. Try disabling firewall in this router (refer to the manual). You may find this thread helpful.