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Win update failed 6 times.
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.133.145.0)
Installation date: 8/22/2012 2:25 PM
Installation status: Failed
Error details: Code 80070666
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
Microsoft Security Essentials - Free Antivirus for Windows
Help and Support:
Microsoft Security Essentials - Free Antivirus for Windows