formatted disk in XP

[havn't a clue]

I just did a complete clean install of WinXp Pro on my computer. The disk size is listed as 200g but actual size was 187g. The previous OS was XP home and before XP PRO install, the free space was 173g. After I reformatted, the available disk space is now only 125g.

How can I get back the 60g or so of hard disk space?

Thank you in advance.