please is it possible to install a new windows for this. i currently have a counterfiet widows 2003 installed, (not by me, i got this secondhand) i would like to be legal if only to have the updates and feel better. i dont have a clue im fairly new to this , the computer is clean and empty so now would be a good time, and where can i get the cheapest battery as this one last eight minutes and twenty seconds on a full charge?