when we are use a Pen drive.. sometime we can't paste or delete any content. it will say write protected. this will happen by virus attack. if we try to format the pen drive through any OS( windows, Linux), we can't format it. it will say unmount volume in Linux. we can only read the items which are in pen drive. if we scan the pen drive with any anti-virus program it will find some viruses(sometime). but it can't heal the viruses. so, how can format the pen drive... if anyone know pls reply... Note:- if this happen to any pen drive it will create "open as a portable disk" in the right click menu. so, tell me how to format those pen drives?