Android Installation problem [Can not complete the Install ] Solved

Problem

Cannot complete the install because one or more required items could not be found.
  Software being installed: Android Hierarchy Viewer 18.0.0.v201203301601-306762 (com.android.ide.eclipse.hierarchyviewer.feature.group 18.0.0.v201203301601-306762)
  Missing requirement: Android Hierarchy Viewer 18.0.0.v201203301601-306762 (com.android.ide.eclipse.hierarchyviewer.feature.group 18.0.0.v201203301601-306762) requires 'org.eclipse.core.runtime 3.6.0' but it could not be found

Please note same message for  "Android DDMS","Android Development Tools" and  "Android Traceview"

Or Duplicate Repository problem where as creating the new Android Project option doesnt appear 

Head over to Help -> Install New Software. Click on Available software sites. Delete the Android repo. Uncheck Indigo & Eclipse updates & recheck them. Now head back to Help -> Check for updates. Once done, add the Android repo again. Accept the license & you should be good to go.

(Had to do the same yesterday after getting Indigo)

Source: StackOverFlow: Pasting here as this Solution worked for me after trying a lot of solutions posted over net