readonly

I need a dvd but the read only files are in the way of erasing them, how can I delete them?

i was transfering photo from my camera to my thumbdrive and suddenly my computer crash. when i open the file,it said that the file is read only file. help me.

Well... I need to uncheck read-only option on all files from an certain game folder in order to apply an updated patch, problem is that don't matter how many times I tries, seems like windows cannot recognize the command, I mean, when the option is succefully unchecked on proprieties, it's...