Windows Live Updater is a program which updates Windows Live Essentials (previously Windows Live Installer). It is a suite of freeware applications by Microsoft which aims to offer integrated and bundled e-mail, instant messaging, photo-sharing, blog publishing, security services and other Windows Live entities. Live Updater is a program that Acer can use to alert users of important updates, patches or updated drivers and applications for their system.

• Live Updater Service

Hi PatrickSD,

The installation of windows updates fails, if there is an interruption of non Microsoft services running on the computer. Many a times the non Microsoft programs interrupt the installation of the updates resulting in either failure of the update installation or incomplete installation. This causes the updates to malfunction.
The major non Microsoft programs that interrupt update installation are: security software, firewalls, media software.

Nevertheless, updates are additions to software that can help prevent or fix problems, improve how your computer works, or enhance your computing experience. I would recommend you to keep the computer up to date.

In order to install any windows update successfully, it’s recommended to disable all the non Microsoft services running on the computer and then install the updates one by one.
The purpose of installing the updates either one or two at a time is because some of the updates need system restart for the changes to take effect.

For your reference, I’m adding some links those talk about.
1. How do I reset Windows Update components? (Reset the update components only if the installation of the updates fails).
http://support.microsoft.com/kb/971058
2. Updates: frequently asked questions.
http://windowshelp.microsoft.com/Windows/en-US/Help/0ae49d2f-8697-47a0-ba50-71405dc0863c1033.mspx
3. Understanding Windows automatic updating.
http://windowshelp.microsoft.com/Windows/en-US/Help/84fee4a4-2000-4de5-98a9-1e897e87f5661033.mspx
4. How to troubleshoot a problem by performing a clean boot in Windows Vista (How to disable non Microsoft services).
Step 1: Perform a clean boot: http://support.microsoft.com/kb/929135 (Disables all the non Microsoft services running on the computer)
Step 7: Reset the computer to start as usual: http://support.microsoft.com/kb/929135

Hope this information is helpful.
All the best!

Live Updater Service

Thanks and Regards:
Syed V - Microsoft Support.
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