How to install Zend studio 5 on Windows 7
1. Download and install the latest JRE for Windows: http://java.com/en/download/manual.jsp
2. Download and install WinRAR: http://rarlabs.com (be sure to install with Explorer shell extension).
3. Downloaded Zend Studio 5.5.1
4. Right-click the Zend Studio install file and choose WinRAR > Extract Here.
5. Go into the folder Windows\resource (the newly-created Windows folder, NOT your system Windows folder).
6. Rename the "jre" folder to "jre backup".