I have Eclipse (Indigo Service Release 1, Build id: 20110916-0149) running on Win XP.
I\'ve added https://dl-ssl.google.com/android/eclipse/ and installed 4 plugins
I just had the same problem on windows 7 running Indigo. I eventually discovered that I had accidentally not run Eclipse as an administrator when I installed the ADT plugin. I solved the issue by uninstalling the ADT plugin, and then re-installing the ADT plugin when running Eclipse as an administrator. Once I did that Eclipse restarted and immediately prompted me for the location of my android SDK.
As far as steps go: