I have a costumer who bought from a friend a HP Pavillion ZV 6000 which was purchased in the US and then brought to Latin America. My costumer does not speak or understand the system language (english) and asked me to change it to a Spanish UI. I tried using the Windows XP Language Pack but (for the first time) it did not work. It said it was incompatible with the systems OS version. I believe it has got something to do with the HP Windows XP installation. My question is, does anyone know how to change the system language for a HP windows XP installation? I already tried the Region and Language settings in C Panel. I also used a MUI (Windows Languge Pack) which usually work fine for Windows XP CD installations. It did not work for the HP installation. What can I do besides recurring to formatting the whole HDD and reinstalling all over again and choosing spanish? Any ideas ? Thanks !