BleepingComputer.com: File Permissions Changing Spontaneously

I currently have a powerpoint presentation along with 2 videos that were embedded into it in a folder I made to organize the presentation. BUt I can no longer open or move the presentation because now "Access is Denied." The videos were orginally in the My Videos folder and the presentation was in My Documents and when I moved all three of them into the same folder the permissions changed. I had to killbox the two videos and re-downloaded them but I don't have time to redo the presentation.

The presentation is due tomorrow and I'm freaking out.