Вы уже установили SP2 для Windows XP?

[Juggalo]

Всё отлично работает.
Некоторые программы, правда, пришлось проапдейтить, но это мелочи.

[alex7]

Вот, скачал заплатку для русского СП2. Не знаю, что конкретно фиксит, пусть администрация, что ли, проверит...
Путь: ftp://192.168.36.145/Pub/Updates/Windows/WindowsXP-KB884020-x86-rus.exe

[Viper]

Фиксит вот что:
Programs that connect to IP addresses that are in the loopback address range may not work as you expect in Windows XP Service Pack 2

SYMPTOMS
On a computer that is running Microsoft Windows XP with Service Pack 2 (SP2), programs that connect to IP addresses that are in the loopback address range may not work as you expect. For example, you may receive an error message that says that you cannot establish a connection.

CAUSE
This problem occurs if the program connects to a loopback address other than 127.0.0.1. Windows XP Service Pack 2 (SP2) prevents connections to all IP addresses that are in the loopback address range except for 127.0.0.1.