The utility should report that which has been accomplished and you would select [B]Done[/B] or [B]ESC[/B] (escape) to exit the utility.
When exiting a DOS app it is not uncommon to have to use the power button to shut off the computer.
I’m thinking that maybe a [B]Primary[/B] partition or file system type (choose [B]NTFS[/B] or [B]FAT32[/B]) wasn’t selected and Windows is still trying to “prepare” a partition.
Choose FAT32 if you use older apps that will not run in NTFS.
Note that when you go back in you may have to use the erase function, if for instance, a Linux file system was errantly selected.
There is also the possibility (not as likely, though) that your XP disc is corrupt/damaged or there is something wrong with the hard drive (use the WD utilities to check).