Hitachi CN7723-Y Instruction Manual page 30

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. Do not check the item "Delete the other software for the device".
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
Do not check this item.