Windows 10: Updated Defender Antimalware Client

Got it last night

 

It worked fine for me too, until yesterday. It changed on two computers. Others reported the same. Based on a posted resolution I changed the setting to what I said (middle setting) and Defender's Real-time protection activated.

I just went back and changed MBAM back to the original setting (top) and so far Defender's Real-time is active. So my guess is there was a glitch with yesterday's update. As you say it does disable Defender but perhaps for some the "fix" needed to be done to get it back. Now it seems the setting could be returned to what it was. I will report back if anything changes.

I should say that I've read many reports of people who do have to use the Never register setting to get Defender to be active with MBAM. That was not my case before the update, and hopefully it now isn't, after. I wonder if those people could change to the recommend setting and have Defender remain active. I'm thinking yes.

 

I understand now. Thanks.

 

And the reason for this update is...

Microsoft has just released an emergency security patch

 

edit: It's my wife's computer. She said it just updated. It has the correct Client. Still was a day later than the others. And it did the exact same thing with Malwarebytes as the others. Defender Real-time becomes disabled and I have to do the fix I posted above.

One of my computers has still not updated to the new Client. Why, I do not know. How do I do it manually?

 

This update now seems to appear in windows update if you go to Settings > Update & security and check for updates, I've just updated one machine that way. On my main machine I got it earlier by opening Defender and manually checking for definitions updates.

 

I had edited my post that the updated Client did show. But now on my computer I notice the Defender icon is missing from the system tray. I assume a restart will bring it back but obviously there are some issues with this program at the moment.

 

Well, an added twist is that it now seems Microsoft have pulled the Antimalware Client update KB4052623 (Version 4.12.17007.17123).

An occupation hazard of offering support in these forums is that sometime you break your own machine trying to investigate a poster's problem. I lost the performance slider on my power icon. Apparently you have to switch the power plan to 'balanced' to get it back - and if that doesn't work there's no known easy fix. So an in place repair install it was - and back to 16299.15 and checking for update all over again...


And that's when I found the Antimalware Client update had gone AWOL. There were two parts to this security patch, the first being the update to the Malware Protection Engine. That I did get...

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11937

...but the Antimalware Client is just the visible UI, the Defender Security Centre, and not the critical scan engine that needed patching. That I could not get any more, either through Windows Update or checking for updates in Defender.

Odd - any idea why Microsoft apparently have stopped releasing this update?

 

Microsoft changes Windows Defender Path on Windows 10 - gHacks Tech News

 

Wish I wasn't subscribed to this. Wouldn't probably have ever known that the Performance and Power Saving settings are gone from power options. I am already on "Balanced" so not sure what you mean by switching to it. I certainly am not doing a repair install.

I did nothing but update my computer and I lost functionality. MS is one messed company. Hoping they fix it somehow.

edit: Or maybe that is how its supposed to work? Searching shows me multiple power plan options were removed with some update. Now you are supposed to left click on the battery icon and there is a slider there. All seems messed to me.

edit 2: Apparently yes it is how its supposed to work. This may help someone. "If you right-click on the battery symbol in Systray and start Mobility Center you can still see three power plans in the combo box and select one."