When you try to install a Windows Live program, for example, Windows Live Messenger, the Windows Live Essentials installation fails with following error code 0x80070643. This issue occurs because a previous installation puts the computer in a state where a restart is pending.
To resolve this issue, restart the computer, and then reinstall Windows Live Essentials.
- Restart the computer
- Visit the following Windows Live Web site: http://explore.live.com
Or http://explore.live.com/windows-live-essentials-beta for
- Click the Download button. When the file download dialog box pops up, click Run to start the Installation Wizard
- Reinstall Windows Live Essentials
Windows Live Essentials Beta