

You can! You already have Windows, so your dual boot would be fine. Grab a easy to use Linux Distro like Mint or Ubuntu and just install, it will keep you existing Windows install as is and install linux on the side. However, If you install Linux first and then Windows you have to restore you grub etc. because Windows being Windows will destroy your dual boot setup.
But in your case you have Windows already so you will be fine!



And we call this democracy! Throw a few million here and few there and now your life is ours to take!