Hello, my name is Emmanuel, and I am an independent advisor. I'll be more than happy to assist you today!
I am so sorry to hear that you are having an issue removing a PowerPoint presentation from your recent file in File Explorer. To remove it, please right-click on the PowerPoint presentation file to see options and then select "Remove from Recent." Please see the screenshot below for a guide.
I hope this information can help you.
Let me know if this works for you.
I look forward to your reply.