Hi gramail,
Along with what Debra has mentioned, you can also try the followng steps.
Go to device manager and then uninstall the 1394 drivers. Now choose Scan for hardware changes by clicking on the Action tab on the top.
Windows will try to find the drivers for the 1394.
Now check if the 1394 Firewire works as expected or not.
If this did not work, then follow the steps mentioned by PC_Tester (dated Monday, November 23, 2009 4:04 AM) in the link
Hope this information is helpful.
Mouneshwar R – Microsoft Support
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