I've recently got my laptop back from repairs because I had a corrupted Hard Drive, so they had to replace it. A couple of days prior to the Hard Drive corrupting I had took a backup of all my files and put them on an online storage medium. When I put the files online on Dropbox.com they were compressed and locked, now I've got the files back onto my laptop I can't open any of them or extract them, it says I need to edit permissions. When I go to permissions it shows my user account as having all permissions (open, close files. Make new files, delete files) etc... but I can't do any of that...