Unrar for Windows will not open in trial version

The click here to continue button only produces the familiar alert or sound, and nothing happens.
What’s the problem, does anyone know?

When are you getting the “click here to continue” button? When you’re trying to install the program? When you’re running it? Or when you’re opening a file with it? Are you still within the trial period?
If these don’t work, try winrar (www.rarlabs.com), 7-zip (www.7-zip.org), or winace (www.winace.com). If those fail to open a specific rar file, you can pretty much guess the file is corrupted or not an rar file.