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Switching to the "Legacy" FireWire driver in Windows 7 ...
https://answers.presonus.com/488/switching-to-the-legacy-firewire-driver-in-windows-7#:~:text=Some%20users%20may%20experience%20some%20difficulties%2C%20such%20as,your%20PreSonus%20FireStudio%20interface%20or%20StudioLive%20mixer.%202.
Firewire (1394a) Drivers That Actually Work in Windows 7 ...
https://answers.microsoft.com/en-us/windows/forum/all/firewire-1394a-drivers-that-actually-work-in/5abf6978-67d9-4c6e-848a-db8eb9f7ae28
Its a windows 7 issue, and forums are filled with EVERY USB to Firewire not working because the driver fails. It will work on older versions of Windows but not Windows 7. This seems to be the case for standard firewire as well. Windows should have an update to fix this by now, but they don't seem to care.
Firewire devices not getting recognized on Windows 7 ...
https://answers.microsoft.com/en-us/windows/forum/all/firewire-devices-not-getting-recognized-on-windows/5202e866-aed8-4a04-8e8b-9927a1906971
Firewire recognition problems My computer with Windows 7 prof. 64bit no longer recognizes any firewire devices I connect to it. The device manager shows the 1394 drivers to be working fine. Both my WD external hard drive and my Sony HDR HC5 camcorder are no longer recognized when I hot plug or cold plug them.
MOTU.com - Using the Legacy FireWire Driver in Windows 7
https://motu.com/techsupport/technotes/using-the-legacy-firewire-driver-in-windows-7
Due to a problem with the default FireWire (IEEE 1394) driver in Windows 7, MOTU FireWire audio interfaces may exhibit symptoms such as audio artifacts or dropouts during audio playback or recording or while an audio client program uses the driver program.
windows 7 firewire problems | Cakewalk Forums
http://forum.cakewalk.com/windows-7-firewire-problems-m1882959.aspx
Try setting the computer's firewire driver to "Legacy" as that may fix it. To do that, go to start, right click on computer, click properties. In the window that opens up, click on device manager. Now find your 1394 firewire bus in the list. Now open it up and double click on that. In the dialogue box that opens, click on the driver tab.
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