FontExpert uninstalls the Batang, Gulim, MS Mincho, Gautami, Mangal, MingLiU, and other .ttc fonts, but after Windows restart the fonts appear in the Windows Fonts folder again.
The fonts were restored by Windows XP "System Restore" feature. (My Computer/Properties/System Restore.)
To remove the fonts from Windows XP, turn off the support to East languages in Control Panel/Regional and Language Options/Languages.
(File names: batang.ttc, gulim.ttc, msmincho.ttc, gautami.ttf, mingliu.ttc, mangal.ttf, etc.)