1- Download latest Apache Tomcat from here. You can download a zip or a tar for Linux or an installer package.

2- Unzip/ install tomcat at a proper place; say in C:/tomcat directory

Set up environment variables

1- To make tomcat run JAVA_HOME environment must be set. If you already have not done this then refer to other tutorial Install And Configure JDK On Windows and set the java variables

2- Right click My Computer click Properties and choose Advance tab

3- Press Environment Variables button

4- Press New under System variables

5- Press New and provide CATALINA_HOME as variable name and path to tomcat home directory as its value

6- Edit path variable and append path up to tomcat bin directory

7- Open command prompt, write startup and press enter. Tomcat will start running