Go to Device Manager and look for WD Drive Management Devices > WD SES Device. If not listed, you need to install above driver manually. Look for “Other Devices” in Device manager while your My Passport is connected. Also now you can use Windows 7 Update to download required driver. Be sure to disable antivirus software while FW update take place. It might block your update utility and show you an error.
To invake Device Manager, type on RUN; devmgmt.msc
Hmm… it is little late in here… 4.54am. must get some sleep:
You have a Passport with USB and Firewire interface. I should have ask this question in the first place. Why you need a FW update at this time? Do you have any issue on drive performence?
For the time being read this Post. It may or may not have somthing to do with your issue. But it is always better to be informed.