Thank you for your reply. 1) My PC is fairly new (December 2003) and the operating system is XP Professional. 2) I have Norton Antivirus and Zone Alarm, which are both up to date, and my computer is virus-free. 3) All other programmes, such as Outlook, Word, Excel, Access, Photoshop CS are working fine. 4) I ran the EXE file from Windows Explorer by double-clicking the icon. 5) I will try your suggestion. 6) I tried to watch your example slide show but nothing happened once the first slide was on the screen.