You were spot on. it works if I ignore the Install Drivers button and
just go to the next step!

I wish they would make things a bit less confusing. I mean how many
others have spent ages trying to find the drivers in this way too.

it's all working now. This is the first conversion I've
done to get someone else over to Ubuntu form Windows. maybe I should
rummage around a few other things first before I try convincing
someone else to make the switch too. any way many thanks for you help
and patience