I could help, but i think, it is better for you to learn your operating system. You have a sophisticated software management software on Lubuntu, you should learn how to install and de-install software on Lubuntu.
Please, hel me! I asked my friend, who is profi in Linux to do smth with this & even he couldn't do anything Paradoxically, I have another small netbook & I inatalled XAMPP on it in 3 minutes. But I have to work with this computer.