Hi the dword value will be in HEX i.e. i.e. if you want to hide drive E the dword value will be (dword:00000010)and if you want to hide drive G & drive C dword value will be (4+40) that mean (dword:00000044) and so on to be more clear if I want to hide all drive A,B,C,D,E,F,G,H the registry will be like this * to show all drive dword:00000000 edit : restart explorer or computer or log off to let change take effect