Windows Azure Tools - Error 0x80070643: Failed to install MSI package

Today I had to install Visual Studio 2012 and Windows Azure 1.8 SDK for a new project. Everything went as a charm; I didn’t have any kind of problems. But after a while I realized that I had a project that is written in .NET 4.0 and use Windows Azure 1.6 SDK and an update to 1.8 is in this moment is not possible.
After installing Visual Studio 2012 and Windows Azure 1.8 SDK I tried to run my old project, but without success. In that moment I realize that I have a big problem, because I will not be able to provide support for that project. I uninstall Windows Azure 1.8 SDK, installed 1.6 but without success. I tried to uninstall Visual Studio 2012 with success. After that I accessed Windows Azure web site and download Windows Azure 1.6 SDK and Windows Azure Tools 1.6 but I received an error when I tried to install Windows Azure Tools 1.6.

Error 0x80070643: Failed to install MSI package

I tried to repair Visual Studio 2010, uninstall and reinstall all the kits related to Windows Azure but with the same result when trying to install Windows Azure Tools 1.6.

Error 0x80070643: Failed to install MSI package

I could not use Last Good Know Configuration because installing Visual Studio 2012 and other tools created a lot of restoring points and all of them were from today. I started to think at the “black magic solution”. Clean install of Windows on the current machine or on a virtual machine. But before this I had a great idea.
What about trying to install Windows Azure Tools 1.6 using Microsoft Web Platform Installer. And surprise. I was able to install with success all my tools. In this moment I have the machine in the state that was in this morning.
About Visual Studio 2012 and Windows Azure 1.8 SDK. For now I will create a virtual machine with a cool configuration W8 + VS2012 + Windows Azure 1.8. In the future, I will install as default machine Windows 8 with VS2012, but in this moment my first priority is to offer support to my clients.