Hi Friends, I have an old laptop with Windows XP home edition and MS Office XP on it. I often have to read files particularly slides created using the later versions of MS Office such as 2007 and 2010. So how can I convert pptx slides into ppt slides? Is there a free porgram for that? I have found this web site but it is something that I have to use every now and then and it is rather inconvenient to me when I do not have net access. Please guide me thanks.