Several .ppt files won't open

  The Teacher 23:51 PM 10 Jun 12

Evening all,

I have some files on my hard drive with the .ppt extension. They are genuine Powerpoint files, some of which I have created myself, and they are saved, along with others, on my portable hard drive.

For some reason, they will not open but other Powerpoint presentations will do.

I get a message that says: Powerpoint can't open the type of file represented by G:\foldername\filename.ppt

I have done the "open with" bit and it states in there that it opens with Powerpoint.

Anyone any clue as to what the problem may be or how I may solve it? The files have been opened before as I use(d) them for work.

I am running Win 7 64 bit with Microsoft Office 10.


The Teacher

  Taff™ 08:10 AM 11 Jun 12

Couple of things to try:

What happens if you copy the powerpoint file to your computer hard drive, then open powerpoint and try to open it directly? (i.e. not by double clicking it.

Are you sure the file extension is .ppt and not .pps? You might need to go to the Organise menu, file and folder options, view tab and untick the "Hide extensions for known file types"

Let us know how you get on.

  The Teacher 09:16 AM 11 Jun 12

Hi Taff,

Done both, it is .ppt, and won't open from copying to laptop and using Powerpoint instead of double clicking.

The Teacher

  Taff™ 09:26 AM 11 Jun 12

This is a tricky one then! Try installing the Powerpoint Viewer MS Powerpoint Viewer

I suspect something has got corrupted. Either the MS Office installation or the actual Powerpoint files. Hope it's not the latter.

Have you tried opening these files on another computer?

  The Teacher 09:43 AM 11 Jun 12

Tried it on other PCs and they won't open.

What I can't understand is why it is just these few, all my other powerpoints open without a problem.

Will try the viewer and see if that works.

The Teacher

  The Teacher 09:50 AM 11 Jun 12

Powerpoint Viewer no good, as it it says it doesn't support the file, only those created with Powerpoint 97 and above.

However, the document properties say that it is a microsoft Powerpoint 1997 - 2003 presentation.

Would altering the file extension make a difference, and if so what was the extension prior to 1997?

The Teacher

  Taff™ 12:06 PM 11 Jun 12

It has always been .ppt as far as I remember. You could try .pps though. Sadly it sounds as if they have become corrupted. One final thought is to check the file permissions. (In Properties)

  scotty 12:08 PM 11 Jun 12

Are the problem files very old (>10 years)? MS provide a tool to allow more recent versions of Office open files created with early versions.

You could try opening the files using another office suite such as Open Office or Libre Office.

  Taff™ 12:16 PM 11 Jun 12

The PowerPoint Viewer link I gave earlier does in fact work with every version back to Office 97 (See System Requrement on the link page) Scotty is thinking of the MS Office Compatibility Tool but that should be included in Office 2010 anyway.

Good idea about LibreOffice - might be worth a try.

  scotty 12:34 PM 11 Jun 12

Taff, there is an issue relating to Office 2003 SP3 which prevents certain earlier files being opened. See . There may be an equivalent issue with Office 10.

I think the compatability tool is mainly to allow older versions of Office to open more recent files.


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