安装tomcat时提示 Failed to install Tomcat7 service

应该是卸载时直接删除目录导致的.

Failed to install Tomcat7 service Check your settings and permissions Ignore and continue anyway (not recommended)?

Alt+R(开始->运行)  services.msc
查看Apache Tomcat 7.0 Tomcat7对应的服务名

然后以管理员身份(桌面右击点击菜单Open CMD)运行命令提示符（cmd），执行

sc delete Tomcat7 命令

这样就可以了