Hi, I've just been given a dane-elec 4gb usb pen drive when i plug it into my computer it recognises it, but when i click on it, it says insert disc into drive, now my laptop is running vista I've gone into disc management to reformat it but it doesn't let me, I've looked in device manager and it say device working properly. Any ideas???? anyone. Thanks in advance. ok just noticed the pen drive is in a file format called master boot record???