Hello. I have something problems: I have two computer in my home. On one installed Windows 7 (1) and on two computer installed Ubuntu 14.04. They are connected with router by wire. First computer don't have a problem. I have the problem with the second. 1) I can't writing thread on ubuntu's forums. When I clicked on button "send", browser showed me error "Connection was reset". 2) Video on Youtube in HD (720p) playing with lag. However, I have GTX 550 Ti and video localy payed is good without lag. I reload browser and change setting on default a lot of. Firewall is disabled. DNS is changed on OpenDNS. I very much ask you to help me. I'm tired :( Ubuntu 14.04 (I installed it 4 days later and this errors were already). Firefox 39.0. I writing with first computer because on second I can't open some page this forum. Могу ещё по-русски читать и писать. Мне главное проблему решить.