Ubuntu 14.04 not responding

I was reinstall Ubuntu, remove Window OS, Format all my HHD and when нормальный Im using computer, I dont open обитал program (include: FireFox, Skype), on Фирефокс I opened 8 tabs. program run in background include Апачи, php, mySQL, ibus Unikey.

My computer have structure:

HHD: 1Tb include three partitions (all have Patition type Ext4)

• swap:/dev/sda1 => 7,2 Великобритания
• filesystem:/dev/sda2 => 102 Великобритания

• Увеличьте Partition:/dev/sda3 => 891 Великобритания

  +) восходи:/dev/sda5 => 307 Великобритания

  +) Develop:/dev/sda6 => 583 Великобритания

ОЗУ: 2.5GB Main: Гигабайт G41 Чип Кор 2 Доу.

the first украдите, I cant использовал keybroad, light on keyroad is Off, after about 5 second, light on мышь Off too and I must hard reset computer.

Please help я. I like Linux and I dont want comeback to Window.