Thank you for the post. The pro 100 VE is a 100mbps network adapter, the maximum bandwidth can be achieved is 100 mbps. You can try adjusting some setting at the advance property of your network adapter to increase the bandwdith but the maximum bandwidth is 100mbps ( it can be lower still sometimes) , please refer to Network Connectivity — Advanced Settings for Intel® Ethernet 10/100 and Gigabit Adapters (but this is for reference since it also depends on the network and not all parameter are applicable).
We no longer provided newer driver for this network adapter since this adapter is an end of interactive support product, you may refer to this website for the announcement Intel® PRO/100 VE Desktop Adapter — End of Interactive Support Announcement
Hope this clarifies.