Hello and welcome leeso Mate I just make a bootable Ubuntu disk set the BIOS to boot from the optical let the Ubuntu boot up and use the TRY version not
You need to download Ubuntu and save to downloads . The use Imgburn to make a bootable disk or stick whichever you prefer I like a disk because I lose stuff in sticks having do many
I think you could also use the Windows disk burning feature though I am not sure about XP?
When that (Ubuntu) is up on he screen you will find all the drives attached to the machine and be able to open them up to retrieve data. Well I must ad that some data is not able to be retrieved but stuff like documents and pics are. Download Ubuntu Desktop | Ubuntu The Official ImgBurn Website
An alternative is use a USB to SATA adaptor on a 7 machine but it depend on what you have access to. See pic for the adaptor