advice on is this the right boot up disc

System Recovery Kit for Microsoft Windows XP System Recovery Kit for Compaq Presario PC S3190UK Desktop English I have been told I need this disc but it seems quite expensive at almost £40 ? is this corect or is there a cheaper alternative Regards Paul

Recovery disks can normally be bought straight from the manufacturer for a lot less price then from anywhere else.
Here in the USA they run between 25 and 40 USD.
Have you tried to contact Compaq directly and ask them about it?
http://www8.hp.com/uk/en/contact-hp/phone-assist.html