Any recommendations for a fairly lightweight windows laptop with good battery life? Budget £800 but not interested in spending more than I have to for a fancy screen or anything, just going to be using it for standard uni stuff, word documents, internet, video streaming etc. Needs to be able to last a good 4-5 years. Ideally with a decent size keypad since I'll be typing a lot. Being able to use DVDs on it might be useful too? I know absolutely nothing so recommendations are muchly appreciated
...or just paranoid?