Well as long as you have a LEGIT Copy of Windows you can install it on your computer.
Just insert the disk, boot from disk.
If your PC isn't set to boot from disk Turn on the PC, press the specified key to enter setup (BIOS) Usually F1, Esc or Delete.
Go to advanced CMOS Features or something along those lines and make sure it is set to CD/DVD ROM, then your hard drive or other bootable sources.
Save and exit bios, insert CD, boot from CD, and install windows.