I recently installed XP Home on my old home PC, a 1.3gh celron, and it's great. However, I cant play DVD's. I have tried a couple of players, Media Player & Interactual, and they both tell me that I do not have a DVD decoder. This is on the same machine that WinME let me play DVDs on Interactual. Do I need a separate piece of software to make this happen, and if so what is it & importantly, is it free or is there a free version. Enough money has gone into this old PC recently......