LaN3Y

my HP pavilion desktop pc recently stoped working. i bought a new samsung SP2514N i have kept the old hard drive aswell so i can run both of them i tryd booting up the new one but it keeps asking for the ntfs how do i sort out the new harddrive and how do i make it so i can use them both together any help will be tuely apreciated as it will get rid of alot of stress lol