Windows Update Auto Update (SUS / Software Update Service) is a mirror site that is synchronized with Microsoft's Windows Update automatically updated service. These Windows Update automatic updates are similar to Microsoft Windows Update automatically update service synchronization, in China upgraded These sites are much better than Microsoft's official website. The upgrade method is exactly the same as the connected Microsoft upgrade server. If your XP, Win2003 cannot be upgraded online, you can go online to check, search, I heard that there is a solution that can not be upgraded, just need to simply modify the registry. But I haven't found ^ _ ^ is some of the domestic Windowsupdate servers (not necessarily useful, there are some servers to limit, only local users can) Shanghai Foreign Mandarin University WindowsUpdate server http: //windowsupdate.shiSu. Edu.cn/ Central Plains WINDOWSUPDATSERVICE- Automatic Update Services Sushttp://WindowsUpdate.zzti.edu.cn Huazhong University of Technology Automatic Update (Windows Update) Service http://windowsupdate.Hust.edu.cn/ Harbin University of Technology WindowsUpdate automatic Update service http://windowsupdate.hit.edu.cn/Xi'an Jiaotong University Software College WINDOWSUPDATE server http://202.117.21.253/ Xiamen University Network Center WindowsUpdate Automatic Update Service http://windowsupdate.xmu.edu.cn Shanghai Traffic University WindowsUpdate Automatic Update Service http://windowsupdate.sjtu.edu.cn Shanghai University Computing Center WindowsUpdate Automatic Update Service http://windowsupdate.ccshu.net/windows/World Local WindowsUpdate Auto Update Service http://www.nxis .org.cn / Tianjin Foreign Language Academy Information Network Center WindowsUpdate Automatic Update Service http://windowsupdate.tjfsu.edu.cn/Hebei University of Technology Software College WindowsUpdate Automatic Update Service http://windowsupdate.scse.hebut.edu.cn/ South China Agricultural University WindowsUpdate Automatic Update Service http://sus.scau.edu.cn/ Sichuan University WindowsUpdate Server http://windowsupdate.scu.edu.cn/