Installing Apache Solr 4.1 on windows 7

Six easy steps to success...

1. Make sure Java is installed
2. Download Solr
3. Install and launch Solr (it comes with Jetty as the app server)
   1. This is a Java servlet, so don't expect an installer, just unzip the contents of the .zip file into a folder
4. Use examples and docs to learn Solr
5. Make your Solr install your own, using your own schema and documents
6. If on Windows 7 Server, set the Solr server jar to start automatically on start/reboot

I can see that you're not familiar with Java Servlets and for such I would then recommend a nice Windows installer that not only Installs SolR, but also Apache.

http://bitnami.org/stack/solr

in a few clicks and no configuration changed, you will be up and running in a matter of minutes with a nice screen like:

By the way, Bitami not only provide you with a nice Windows Installer, but gives you as well a VM with Solr (so you can test it without screwing up your current system) plus a lot more methods to install and run SolR!