Windows 7 - windows security service center remains disabled

My system tray keeps showing me the flagged message "Turn on Windows Security Center service (Important)" but when I click, it says "The Windows Security Center service can't be started."

Then, I found some suggestion about starting the services.msc - by clicking on properties, choosing automatic and then clicking start, but  the security center (under services) reverts back to "disabled" & "can't be started".

I'm running Windows 7, Ad-aware, Malwarebytes & Avg free.  I had a "redirect" virus which would redirect any search i made with any browser & search engines but Malwarebytes healed & removed that.  All other scans have come back clean.

Any help will be greatfully appreciated.

Thanks in advance.

windows 7 security - News
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