Thanks everyone.
My machine is a Mesh and I'm pleased with it up to now. Another thread on HDD failure started the cogs whirring and I wondered where I would stand in the great scheme of things should disaster strike. I think some PCs are supplied complete with the OS Disk........but I know some aren't . Another of life's little mysteries!
Thanks for your responses one and all, I'm much better informed now.
W B E
No, when I added scanner and printer I wasn't instructed to insert Win CD
Edited to take into account W B E's response which appeared as I was typing this post.
Overtaken by events again !