Hp Pavilion G4 1303au 'F:\ and H:\ is not accessible. Access is denied'

Hi,<br>I Have Hp Pavilion G4-1303au with Windows 8 Pro 64 Bit<br>Whenever I try to access media in my DVD-RW<br>drive and USB drive(in Windows 8 pro) I get the<br>following:<br>'F: \ is not accessible. Access is denied' (my<br>DVD-RW drive)<br>'H: \ is not accessible. Access is denied' (my<br>USB drive)..<br>Plz Fix My Problem I m Very Frustrated ...<br>So plz Help me Urgent ...<br>Thank in advance ...