Hitachi CN7721-Y Instruction Manual page 32

If the driver has been already updated to the latest version, the
following window will open. In this case, click Close.
6. The Property window opens. Click the Driver tab and then click Uninstall.
Click OK
7. For the device whose device driver has not been updated, repeat steps 2 to
6. Check that Broadcom NetXtreme Gigabit Ethernet appears by the
number of installed Cards under Network adapters.
8. Updating LAN driver for all adapters is completed, click Action of Scan for
hardware change. Then LAN driver will be updated automatically.
5-4 Installing a driver
PCI-Express Dual Port Gigabit LAN Card Instruction Manual