[ubuntu] Ubuntu lags on my netbook.

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http://ubuntuforums.org – Hi, I'm new(ish) to Ubuntu, and once tried it on my laptop. Soon I want to build a computer; I've got all the components worked out and decided to use it for it since I can't afford Windows. So, I decided I should learn more about Ubuntu, learn shell scripting, and to get used to it before I build my computer. So, I installed it on my netbook, and it lags badly. It's just general lag, opening programmes, screen freezing, etc. Do I need to install driers or something? If anyone could help, that would be great. No jargon please, I'm new to Linux. ;) Oh, my netbook has... ... 1GB RAM, Intel At (Hardware)