Thanks everyone for help. I hope this post helps someone else as well. <br><br>wogster: <br><br>I did indeed install LibreOffice as I use it for all my work. Lo and behold it worked! I was somewhat surprised. After a reboot, that had nothing to do with this, I also discovered that PowerPoint was working. Hey ho!<br><br>BTW if anyone reading this is a bit wary of LibreOffice, no need to be. It is all I need, and may be all most people need!<br><br>tgc<br><br>I did get some error messages, but I am recalling them from memory. Firstly when the ppt presentation imported, there was a big red cross next to it. Then when I tried to run it, the message was something like, "The presentation is incomplete and could not load"<br><br>As for Office 365 I thought that was the case. <br><br>Anyway it seem to work now. Am a bit puzzled as to why it did then didn't as I am unable to put it right if it stops again!<br>