If you are unable to upload the PowerPoint presentation, check for the following:

    1. Make sure the presentations you upload is not read only file.
    2. If the presentation is password protected or corrupt it will not upload.

      To test if the presentation is corrupt, follow the given steps:

        1. Open the presentation in MS-PowerPoint.
        2. Go to File Menu and then select ''Save as web page''.
        3. If the file gets successfully saved as web page, your PowerPoint is fine and if MS-PowerPoint crashes it means the file is corrupt.