Hey members.
It's been a long time since I can be able to back to the forums.
Well anyway, I have an old pc that I've bought since 2003. It's 10 years old now, but it's still working.

This is my computer's detail :
1. Processor : Intel Celeron(R) with 1.8 ghz speed
2. RAM : 512mb
3. motherboard : a local motherboard, which is "MSI" labeled.
4. 120GB SATA Drive hdd

In my plan, I was going to replace the old buggy xp with an ubuntu distro.
But the question is, which one should I pick ? And I need to pick the lightest one.

Perhaps, Xubuntu ? or.. Lubuntu ?
Which one is going to run smoothly in my pc ?

Thank you so much for the answer, I appreciate it