Thursday, July 11, 2013

Solution for Microsoft Security Essentials (MSE) unable to run after Windows update

Yesterday, the automated Windows update of my laptop installed some updates, and one of them related to Microsoft Security Essentials (MSE) failed.

Since then, the Microsoft Security Essentials unable to run, and the Action Center keeps on telling me that there is no antivirus and spyware protection running on my Windows 7.

I managed to fix it by this way:

Note: If you directly reinstall MSE without running the OneCareCleanup tool, the installation will stop halfway, giving out a 0x80070643 error.

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