Hey everyone. I have a mystery, and I'm hoping some of you in this group have encountered this problem and can help me solve it.

I've created a PowerPoint with many pictures and set it to play various songs. When I brought in the pictures via copy/paste, they looked normal and the deck ran like it always does. I saved it to an external hard drive, and shut down my computer for the night.

The next day I went into the same deck and found roughly half the pictures to be completely blocked out or not read into the deck all the way. The pictures are still there with the same effects I assigned to them, but I can't see them because they've been assigned one color (mainly blue) or have been blacked out completely. I've been told that something happened when they were copied to the external hard drive, but I can see them just fine there, and it doesn't explain why they're becoming distorted and not viewable in PowerPoint.

This is a very frustrating problem since I'm creating this deck and saving it regularly like I should--only to find these picture errors and have to fix them if I want to have my deck in a viewable format. The problem isn't local to one specific PC, and it shows up on both the Windows 8 and Windows 10 platforms. I've also run a full virus scan on my laptop and external drive, but both came up clean.

Has anyone experienced these issues? If so, do you have any thoughts on how to fix the problem?

Please help...

Thanks...