建议尝试:打开注册表(运行中输入regedit)/HKEY_LOCAL_MACHINE/SOFIWARE/Microsoft/Microsoft SQL Server/100/ConfigurationState将以下4个选项值由3改为1commonfilescommonfiles_locsql_engine_core_sharedsql_powershell_engine_cns保存重新启动主机然后重新安装就ok了!