I have an old PC running on Windows XP. When I got it, I partitioned the hard drive. I need to know how to install Ubuntu on That particular partition, since I have almost no space on my other drive.
Remove the empty partition and keep the space unused.
Ubuntu installation will find and use it. Ubuntu needs at least two partitions in formats not understood by Windows. So you cannot create partitions for Ubuntu to use from within Windows.
Particularly, Ubuntu needs a root partition with the mount point
hope this helps