$ 0 0 DescriptionAfter plugging in a USB flash drive, it does not appear in 'My Computer' window, or has no assigned system letter.CommentsThe issue may indicate the lack of DeviceLock access permissions for 'SYSTEM' account for USB Port and/or Removable.RecommendationsMake sure that 'SYSTEM' account is added into USB Port and/or Removable access control list with 'Full control' privileges.