But you can fix that. Fire up the Registry Editor and look for the following keys:
(default user) HKEY_USERS \ .Default \ Control Panel \ Desktop \ FontSmoothing (String Value)
HKEY_USERS \ .Default \ Control Panel \ Desktop \ FontSmoothingType (Hexadecimal DWORD Value)
Make sure both of these values are set to 2 and you'll have ClearType enabled on the Welcome screen and on each new user by default.
[THIS METHOD IS FOR XP ONLY...!!]