The registry setting HonorDrivePolicy
= (REG_DWORD) 1
should hide drives that are supposed to be hidden and not accessible by GPO. When WinSCP is launched, the dropdown box for the left and right Commander panes indeed do not show any of the hidden drives. Unfortunately, hidden drives are still accessible through Left > Go To > Open Directory/Bookmark..., in the following dialog "Open Directory" it is possible to type the drive letter of a hidden drive in the dropdown box "Open directory" (e.g. C:\
, D:\
), then click "OK" and the contents of the hidden drive is shown in the left Commander pane. The same goes for Right > Go To > Directory/Bookmark.... When the application is closed and restarted, all the supposedly hidden drives are selectable in the dropdown box for the left and right Commander panes. The drives become hidden again, when a different drive is selected which normally is not hidden to the user and only when the application is restarted.