What are these?

Last year on Windows xp I transferred 'still photo's' from Canon camcorder mv930 SD card to my desk top PC, which transferred from the camera to Zoombrowser windows.
Then automatically to 'My Pictures' I then placed all the photo's in to a file entitled France, then sorted all photo's to relevant files/folders Eg: folder name: Saint Malo all related photo's were placed in that folder and so on until all were sorted. Then was successfully burned the 'France' folder with it's subfolders to a DVD.

I have a laptop ‘ACER’ using Windows 7 I copied the DVD to ' My pictures' on the laptop and opened it to find that all folders have a green dot with white checkmark in/on it. I then opened one subfolder (Saint Malo) to find the photo's each had the same Green dot with white check mark in/on it. Going through the rest the most common was the Green dot with a couple of folders having a blue dot and white circle in/on it and four photo's with a red dot and white x in/on it.
I hope you have a solution SD!. if not can't see why you asked for more information on my 'Photo's on laptop' about four questions back from this one.