Download Fix it Tool from Microsoft here.

If you had tried to uninstall Windows Essentials by deleting its files in program files, this step will come in handy. It will remove bad registry key on your operating systems and resolves problems that prevent programs from being completely uninstalled and blocking new installations and updates. This troubleshooting tool by Microsoft will look for uninstalled programs from your registry and try to force them to uninstall. To do this, please execute the steps below: Step 1: Run the Fix it Tool This will clean out all related files of your Windows Essentials that are stored in your system. To fix this we recommend that you uninstall the application using the CMD line parameter this is different from uninstalling the application via the control panel. Method 1: Uninstall Windows Essential 2012 using Command Prompt Here are the ways we have prepared to help you remove Windows Essential 2012 and reinstall it afresh. The issue can be caused by corrupt files in the registry or corrupt files in the program’s files folder. This is a common problem with corrupted previous Windows Essentials files. So the question is – how can you completely remove the whole of windows essentials 2012 so that you can reinstall it without the installer not finding an “already installed” pointer? If you choose to install, the installer says that everything is installed and working OK but it seems like nothing installed at all or the problem persists. Several users report that after uninstalling Windows Live using the programs and features window from the control panel, running the installer only gives the possibility to choose applications to install, but not repair or remove. If that fails to function properly, the next logical thing would be to uninstall Windows Essentials and then install it afresh. If Windows Essentials fails, you will want to repair it using its installer.

Unistall windows live essentials