File/folder that won't delete.

In order to have enough space on my iPhone to update it, I deleted all of my photos and videos after saving them to my laptop, which is not a Mac. After my phone was updated I synced all the pictures and videos back but when I did so, they did not go back to the camera roll. Instead a new folder/file was put in my photos. This new folder/file does not have a trash can icon where I can delete the photos that I synced. The videos went back where they were supposed to and all I need to do now is delete the file/folder as recently stated. The only problem is, I cannot delete the photos/videos inside the folder nor can I delete the folder as a whole. I've already done things the hard way in order to get the photos I wanted back onto the camera roll by screen shotting them so the only thing now is to delete the folder/file. So, my question is, how do I delete it?