How to get dual operating systems

How to get dual operating systems If this fails for you contact me.Every system is like a fingerprint. I will only instruct on part 2 at individuals request.Will be glad to assist,just ask. this is the edited version,with correct spelling Hello today im going to Show you how to have 2 OS To do so You will need to get a 2nd OS...... something like ubuntu that is free so google it !! and now download it then put it on a CD-R or a DVD-R well u get it just put it on something now it's not as e z form here on. now my pc came with 2 Partitions 1 at 255gb And 1 at 10gb not idea but will work. if you dont have 2 Partitions you can make a new Partition but might lose the old OS but no big deal as long as u have the old OS cd. so you need Vista and ubuntu Cd 2b safe now u got ubuntu on CD put it in now and use it n windows. will show u. this is if u got 2 Partition's if not i will show how to make 1 n a Part 2 video something is up with the set up but i hope you can get it form hear it will ask you witch Partition to put it on So put it on "D" that's If all u got in the list is "C" and "D"