When Tomcat is installed, the following error occurs: failed to install Tomcat 6 service... Solution

Recently I have reinstalled Tomcat 6.0, but I don't know why it is always unable to be installed. When the installation progress bar shows at 1/3, the warning of failed toinstall tomcat6 service is always displayed, as shown below:

    Apache Tomcat setup
    ---------------------------
    Failed to install tomcat6 service.

    Check your settings and permissions

    Ignore and continue anyway (not recommended )?
    ---------------------------

    Stop Retry Ignore

Because the previously installed tomcat has not been uninstalled, do not delete the installation directory. You also need to do the following:

The specific practices are as follows:

      1, Start --- run --- cmd

   2,Enter SC Delete tomcat6 IN THE doscommand line.

    3. No error is reported during reinstallation. Tomcat 6 can be started normally.