Up until last Saturday PowerPoint played my MP4 files correctly. Now, nothing is displayed and no sound is heard.
When using the "Play" option within PowerPoint, "cannot play media" is displayed.
I've applied all the Windows 10 and Office 365 updates, and still nothing.
The MP4 files play in both Windows Media Player and the new Films thingy on their own.
MP3 files still play through PowerPoint.
I've uninstalled Office 365, and reinstalled it. No change.
I've tried using AVI files. No change.
I've used Windows Defender to scan my laptop. While it removed one file ... no change.
I've used the boot version of Defender ... no change
I really need assistance with this, as I need to play MP4 files from within PowerPoint.