so I have a kinda old desktop computer(well 4GB RAM) with Windows XP on it, so im considering installing Ubuntu for now on it,and have a dual boot(Windows-Ubuntu).I started parted magic on the desktop pc to check what were the partition to see what they were and here what I got:

<http://s29.postimg.org/pm7romadz/IMG_2828.jpg>

the entire(well 99%) of the disk is a single NTFS partition that has windows XP on it.So I am wondering if its possible to decrease the NTFS partition to create a new one for ubuntu, even if windows XP is on this partition? Because it says theres still 111GB unused in the partition?Is there any risk to corrupt Windows XP if I do this?

thank you!