Aha, The sound card has now appeared on the Device Manager list, but it seems to be a very old one.. very old. This maybe be because I installed an old version of the sound card driver yesterday. But I fail to see why this would have made any difference if it is a different model as surely the same error would pop up.
Now the icon has a (!) next to it on the Device manager window, and I have right clicked update driver all to now avail, even googled the name of the card on the device list. (Sound Blaster 16 or AWE32 or compatible (WDM)).