My mate has had a breakdown with his hard drive and he's put a new boot drive in. He has now got access to his old drive by putting it in an external USB2 case and he can see the files. However he can't do anything with them because the message "Access Denied, You Don't Have Permission" is shown. He's tried to right click and gone on to Sharing and Security but can't do anything from there and gets "Error Occured, Access Denied". He's using XP Professional. Any ideas?