It is possible to use Focusrite's FireWire products with Windows 7, however it is currently necessary to downgrade the Windows FireWire drivers to the Legacy version. To do this:
1. Find your FireWire (IEEE 1394) controller in Device Manager (START>CONTROL PANEL>SYSTEM>).
2. Click "Update driver"

3. Select "Browse my computer for driver software"
4. Click "Let me pick from a list of device drivers on my computer"
5. Install the driver that ends with "(Legacy)".

6. Reinstall your Saffire driver using the latest version from the
Focusrite website, and re-connect your device.
If you continue to experience problems, please
contact Focusrite Technical Support.