Recently, my brother came over and fooled with the computer. He edited some aesthetic details (background, adding panels, etc), but after he left he told me the computer shut off on him randomly. I fixed that. Apparently, all it needed was some cleaning.
Now, however, after fixing his errors, I can no longer delete files or save files. When I try to delete things, a window pops up saying, "Failed to copy (FILE NAME) to "trash:///cdrom0": Failed to open (FILE NAME.trashinfo) for writing." I don't know what this means and I don't know how to fix it. Any suggestions?