Windows Live系列软件安装遇到问题?
1. 关闭所有Windows Live程序.
2. 打开C:/Program Files/Windows Live文件夹,删除"install"文件夹
3. 打开C:/ProgramData,"Windows Live Installer"与"WLInstaller"文件夹(如果有),注,XP系统的该文件夹是在C:/Documents and Settings/All
Users/Application Data
4. 重新启动(必要的)
5. 重新安装你需要的程序.
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Windows Live Installer problems? Try this.
If you are having problems installing Writer, Messenger 8.5 or Mail, in particular if the the Windows Live installer disappearing halfway through (after a Windows Vista UAC prompt if enabled), this may help.
- Close all Windows Live applications
- Navigate to C:\Program Files\Windows Live and delete the Installer folder
- Navigate to C:\ProgramData and delete both Windows Live Installer and WLInstaller directories if you have them.
- Reboot (important!)
- Reinstall the application you want to install
This may be an issue if you installed the leak Messenger build, as all Windows Live beta applications need to be the same language. See the Windows Live Installer FAQs for more details.
PS: If someone can tell me what the equivalent for step 3 is in Windows XP that’d be great 
Update: Apparently step 3 for XP is to go to C:\Documents and Settings\All Users\Application Data instead of C:\ProgramData. (Thanks to DN2004 for the heads up)