Hi ,
First chance I've had to say thank you jamaine, lapwlover,Nick29 & Redroger for your tips and web links on this subject.
I've yet to decide which method/programme to choose for a backup plan.
So far, I've just copied all my Documents (including Pictures, music etc)from the PC to the External Hard Drive every Friday evening and it seems to work o.k.
I know it must seem to be a bit of an old plodding way of backing up my Data but it does seem to be o.k and I thought I'd carry on plodding until I've got a better grip of my new PC and Windows 7.

Thanks all again for the advice and help.
Barbara.