Windows isn’t the only operating system you can run on your PC. Provided you have space on your local drive, you can use multiple partitions to run different Linux distros, create storage partitions, ...
My computer currently has two hard drives in it. A 120 gig drive for all my music, movies, homework, and ransom files, and a 40 gig drive. The 40 gig has a 4 gig partition for windows xp, a FAT ...