Solved AV Conflicts (POST 2): Avast and Windows Defender 8.1

Dell - inspiron 17.3" laptop - 4gb memor...
July 15, 2014 at 08:53:31
Specs: Windows 8.1, AMD A8/4.0Gb
I installed Avast Free which automatically disabled Window Defender 8.1. After running an AV scan, Avast indicated two "The parameter is incorrect (87)" errors. I contacted Avast support who said the errors were caused by a conflict between Avast and Windows Defender. I was told the solution is to remove Windows Defender and make the necessary registry corrections.

In response to a previous inquiry on Computing .net -
http://www.computing.net/answers/se... - I was told that Windows Defender 8.1 is part of the operating system and can not be removed, only disabled.

Any suggestions?

Thank you.
Brian W


edited by moderator: Added missing link to previous thread


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#1
July 15, 2014 at 09:44:48
✔ Best Answer
About all I can suggest is that you temporarily uninstall Avast then before installing it again go through the Windows Defender disable process here:
http://www.sysprobs.com/how-to-remo...

It might work - just depends how Avast disabled it.

Always pop back and let us know the outcome - thanks

message edited by Derek


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#2
July 15, 2014 at 14:40:27
If Derek's suggestion doesn't work, I use Windows Defender myself.

If needed. Avast Software Uninstall Utility
http://avast-removal-tool.com/
http://www.avast.com/uninstall-utility
http://www.bleepingcomputer.com/dow...
http://www.softpedia.com/get/Tweak/...


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#3
July 16, 2014 at 07:23:42
Derek,

Before I tried your suggestion, I checked and noticed that Windows Defender was disabled and the same screen was visible as in the sysprob directions. I followed your directions and then ran Avast again. Unfortunately, the same error messages appeared again. Does this mean that Avast is ineffective and I should delete it and go back to Windows Defender 8.1 as my AV protection?

Thank you for your assistance.
Brian W


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Related Solutions

#4
July 16, 2014 at 15:34:47
Difficult. I am happy enough with Windows Defender as, I believe, is Johnw. However I know some helpers rate Avast as better then WD and I've no reason to go against that belief - in fact AV ratings seem to often suggest this.

Sometimes with computers you can get conflicts which possibly come along with the particular hardware and software combination you have on board.

If you want to try something different and Avast has issues with WD being present then I think Bitdefender free is worth looking into. Like WD it is completely unobtrusive, does its thing without hassle and has good ratings too. If you want to try it disable WD real-time option first. It might be best to first use the Avast uninstaller, as already given, to ensure there are no remnants about.

Sorry I have no answer to your particular about substituting WD with Avast. I think it is "just one of those things".

Always pop back and let us know the outcome - thanks

message edited by Derek


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#5
July 16, 2014 at 16:29:35

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#6
July 16, 2014 at 16:46:12
Re #5

That's the link I gave in #1. It says it cannot be removed, only disabled.

Always pop back and let us know the outcome - thanks


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#7
July 16, 2014 at 16:51:15
Brian W

Did you also ensure that WD was disabled under the real-time protection heading?

Always pop back and let us know the outcome - thanks

message edited by Derek


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#8
July 16, 2014 at 17:29:55
Derek,

WD was disabled under the real-time protection heading.

Does the fact that using Avast causes "The parameter is incorrect" error make Avast ineffective as an AV program?

Thnak you.
Brian W


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#9
July 16, 2014 at 18:13:25
Re #8

Error 87 is described as one caused by missing system files or broken system registry structures.

On that basis I wouldn't trust it to be doing its job properly if this error is showing.

Always pop back and let us know the outcome - thanks


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#10
July 16, 2014 at 18:53:10
"On that basis I wouldn't trust it to be doing its job properly if this error is showing"
+1

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