廣受關注的Windows XP SP3 RTM 最終發布時間已經確定，第一批將在四月的下半月發布，其中包括簡體中文版。Windows XP Service Pack 3 包含一系列補丁和更新，并將提供針對Windows XP的序列號擴展，SP3版本將不會發行內置在Windows XP Media Center Edition 或 Windows XP Tablet Edition中的版本，它們需要執行更新才能升級。和Win XP SP3分為兩“波”發布，具體時間表如下。

Wave

Languages

Planned RTM

1

Chinese (Simplified), English, French, German, Japanese, Korean, and Spanish

Second half of April 2008

2

Arabic, Chinese (Hong Kong), Chinese (Traditional), Czech, Danish, Dutch, Finnish, Greek, Hebrew, Hungarian, Italian, Norwegian, Polish, Portuguese (Brazilian), Portuguese (Portugal), Russian, Swedish, and Turkish