Displaying powerpoint files on a website

I had trouble displaying powerpoint files on the website that I was working on. The problem was the link to the powerpoint file was a powerpoint 2007 show file (.ppsx). But when you clikc on the hyperlink, it was downloading with a .ppt extension

I have done some googling to resolve this problem and found that in order for links to PPTX/PPSX files to work, the two conditions must be met:

• The user must have PowerPoint 2007, the 2007 Viewer or an older version of PowerPoint with the compatibility pack installed so that they can open PPTX/PPSX files in the first place
• The web server configuration on your site must have the correct mediatype/MIME settings to serve PPTX/PPSX files as PowerPoint 2007 presentations.

The above is an extract from the article on pptfaq called Control how the browser opens powerpoint files