Install nvidia drivers and don't use xubuntu. Use antergos or manjaro (with XFCE) if you want to have a stable and fast OS. But I like Lapis Lazuli
You should use an Windows 7 x86 on 3GBs of RAM
If I wouldn't buy a DDR3, I would probably use a Pentium E5200 right now. Seriously, I know that's weird, but using old hardware just feels much much better. Can you guys relate to it?
By the way, I bought a new battery for my laptop. 1,5 - 3h on battery time, 8 years old laptop. I think it's not that bad... but this laptop weight is... 4kg!
You can only imagine how I look like when I'm trying to grab it in one hand. Soon I will be coming to UK with cabin baggage only. Laptop is taking 4kg of 10kg total limitation