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System: Windows Pro 8.1
After removal of AVG 2015, Windows Defender fails to start.
When attempting to start Windows Defender via the UI
It fails to start with error 0x8007139f
When attempting to start the service
It fails with error :
Error 577: The Windows Defender Service service failed to start due to the following error: Windows cannot verify the digital signature for this file. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source.
Does anyone know how to repair Windows Defender or otherwise get the service running again?
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Try system file checker -
– Nikhil_CV – 2015-10-10T03:32:59.613sfc /scannow
... More info at: http://answers.microsoft.com/en-us/protect/wiki/protect_defender-protect_start/problems-starting-windows-defender-in-windows/808253bb-db89-4db9-a4e5-1c91a86489e9Did you use AVG's removal tool to remove the product installation? – Nikhil_CV – 2015-10-10T03:34:22.480