I am getting errors from Eclipse Indigo running on Windows 7 Ultimate. For each of the following items:
Android SDK content loader
Building workspace
Initial
Close all open projects and exit Eclipse. Now you can open Eclipse without getting the error. Start opening your projects one by one to find which one causes the problem. This is most likely because you deleted a Device profile inside the AVD manager.
Or you can start working on a new workspace, (i.e. change your workspace), then try to import your project from the old workspace