|Does the bios screen you posted say boot order or something similar? Depending on bios there is either the choice of reordering the list or there is something at the side that says 1st 2nd etc.|
If reorder it should look something like this
CD/DVD-O PIONEER DVD-RW DVR-115D
IDE-O Maxtor 6Y080L0
FLOPPY 1.44MB 3 1/2
USB RMD-FDD Generic Storage device
CD-DVD-1 LITE-ON LTR-48246S
the other issue is if this is not a microsoft xp disk but a copy. Does it have the xp ms logo on it?
As a suggestion I would call the store you got the pc from and ask for their technical support. They may try to pressure you to bring in the pc but all you need to know is how to change the boot order. They should tell you this as a customer service gesture. In their place I would have walked you thru it since I would have known the model and bios by heart.