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Can't start Defender - Help!


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#1 Martin1992

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Posted 27 July 2018 - 09:19 AM

Good afternoon.

Thank you for registering me.

I have used Windows 8.1 for years with no problem.

Lenovo Desktop - CPU  3.6 GhZ - 8gb Ram - 1tb Drive - Only Windows 8.1 installed, no other OS.

 

Then this week, Defender stopped working.

On services.msc, it's on Automatic, but when I click on Start, I get "Windows could not start the Windows Defender Service service on Local Computer. Error 14105:The size of the manifest exceeds the maximum allowed"

If I try to start Defender from the Control Panel, I get "Windows cannot access the specified device, path, or file. You might not have the appropriate permissions to access the item".

I am Administrator and I am the only using the PC.

I have run Microsoft MRT -> no problem.

AdwCleaner -> no problem

Rkill -> no problem

FRST64 -> no problem.

RogueKiller -> no problem

All I have in StartUp is peerblock (I know it's old) and Malwarebytes anti-exploit 1.12.1.100

I ran CCleaner several times - version before the last one because Monitoring is stuck otherwise (known bug)

Windows updates and all drivers are up to date.

I tried to run Combofix but it displays "This operating system is not supported ... ... Windows 2000 is no longer supported"

 

I don't really want to use Avast / AVG etc, nor do I wish to reformat the drive nor reinstall Windows.

Everything works fine except Defender.

 

Could someone help me, please?

Thanks

Martin



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#2 mikey11

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Posted 27 July 2018 - 11:18 AM

do a system restore to a date previous when the problem started......

 

if that doesnt work.....

 

start your computer in safe mode and try to start defender....will it work in safe mode?


Edited by mikey11, 27 July 2018 - 11:18 AM.


#3 Martin1992

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Posted 27 July 2018 - 07:30 PM

do a system restore to a date previous when the problem started......

 

if that doesnt work.....

 

start your computer in safe mode and try to start defender....will it work in safe mode?

Hi Mikey,

All the restore points were removed by one of the utilities supposed to fix problems.

No luck with Safe mode.

No luck with sfc /scannow

No luck with the health check and health repair from the command line.

Kind regards.



#4 mikey11

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Posted 28 July 2018 - 08:14 AM

From command prompt run

Chkdsk /f /r

#5 Martin1992

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Posted 28 July 2018 - 09:25 AM

From command prompt run

Chkdsk /f /r

Nothing wrong with the hard drive.



#6 mikey11

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Posted 28 July 2018 - 10:10 AM

boot with a win 8 install USB and do a repair



#7 Martin1992

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Posted 28 July 2018 - 01:00 PM

boot with a win 8 install USB and do a repair

 

Sorry, you lost me here.

How do you suggest I replace a particular service -Windows defender in this case- from an installation disk / USB?

There is no such option in the repair section.






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