I recently had to reinstall my Adobe Creative Suite 3 Web Standard on my same laptop when I replaced a bad hard drive. Now I find out I have to replace the hard drive yet again (freezes up, tech guy thinks its been knocked around too much). I've googled around a bit and have read that I can install my (limited, student licensing?) Adobe software on two "machines". What is meant by machine? If it's the same computer, is it the same machine if I have to put a new hard drive in it? In other words, will I be able to install this a third time on the same computer if I've done so twice on two different hard drives?
What you should do is contact Adobe Support using chat and ask them to reset your activations. That way you have a fresh slate of two waiting for you to use.
The limit of two machines is a continuous limit, not a one time limit, meaning as you change machines you can move your license as needed. Normally you would deactivate an installation (by selecting Help -> Deactivate), but when a machine dies you lose the ability to deactivate. Adobe support can take care of that by resetting the activations.
For the link below click the Still Need Help? option in the blue area at the bottom and choose the chat option...
Serial number and activation chat support (non-CC)
http://helpx.adobe.com/x-productkb/global/service1.html ( http://adobe.ly/1aYjbSC )