Here are a few things mentioned:
- Mail: We fixed a sorting issue in the Sent items folder and improved the upload reliability and instrumentation in Photo mail.
- Messenger: We fixed a couple of stability issues and made various changes for improved voice and video quality. We fixed an issue that was causing sound to be lost after upgrading, and we improved performance when displaying the MSN Today page in the main window.
- Photo Gallery: We implemented various bug fixes for crashes related to launching Photo Gallery through Autoplay and facial recognition.
- And more: We made many other usability, performance, and stability improvements across the suite of Windows Live Essentials apps.
I had to uninstall the previous version of Windows Live Essentials 2011 due to some problem with Windows Live ID Sign-in Assistant and then I had to restart before succeeding.
If you get this error it might help to just restart the computer: Windows Live Essentials couldn’t be installed. It looks like another program is preventing the installer from working. Error: 0x80070643 Source: wllogin-amd64