thanks for the suggestion. Yes I've downloaded the driver.
The nic, when you use device manager, shows:
under general - no manufacturer info
under driver - Driver Provider Unknown
In short, the operating system doesn't appear have enough information to select the driver I've downloaded.
If I could force the operating system to load the driver that I specify, perhaps there would be progress. I cannot find a way of telling the operating system the directory AND exact filename for the driver. The OS seems only to be able to accept a directory name!
Any further suggestions appreciated. Thanks. Alan