Windows based firmware flash update for PLDS DH-4B1S BD-RE 1. Download and unzip the HB1_7D16.zip into your desktop. 2. In HB1_7D16 folder, please search for the Windows folder. 3. In Windows folder, please make sure you have the administrator right, and double click on 7D16WIN.EXE 4. Click on Update button. This may take as long as two minutes. Please wait for the process to complete. 5. You should see Firmware has been updated successfully 6. Windows must restart to complete this operation, please save all data and click on "Now". DOS based firmware flash update for PLDS DH-4B1S BD-RE 1. Unzip the HB1_7D16.zip into your bootable USB key. 2. In Dos folder, just type 7D16DOS.EXE. 3. Please select "1" (assume this is the only optical drive) and wait for 2 minutes. 4. You should see Firmware update successfully! 5. Windows must restart to complete this operation, press "Yes".