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Interference between Malwarebytes Premium and Microsoft Safety Scanner?

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Hi guys,

I was unsure where to post this. I hope I picked the right place.

Recently, Windows Defender detected a trojan virus on my laptop. Since I didn't have any important data on it (I only use it en route), I erased the HD/SSD and reinstalled Windows 10 from a bootstick (or rather had someone do it who's more tech-savvy than I am). I now use Malwarebytes Premium on my laptop in order to increase safety.

However, since I changed to Malwarebytes Premium, Microsoft Safety Scanner keeps detecting and deleting the following thing: "VirTool:Win32/DefenderTamperingRestore". Since the HD/SSD has been erased, that either means that some malware still is on my laptop (in the boot sector for example) or that Microsoft Safety Scanner now produces false positives (maybe because it mistakes the newly added Malwarebytes Premium for an attack on Windows Defender).

I tend to think that the latter is more likely since the exact same thing also happens on my PC where I also changed from Windows Defender to Malwarebytes Premium. On top of that, Malwarebytes Premium doesn't detect anything (neither on the laptop nor on the PC). Neither does ESET Online Scanner.

Could that be about right?

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Thank you for your reply.

I didn't disable Defender manually. I installed Malwarebytes Premium and after I did that, Windows seems to have turned Defender off automatically. When I open Windows Security and go to Virus/Menace Protection, I see "Malwarebytes is activated". Microsoft Defender is off (but could be turned on again with a switch).

In the settings of Malwarebytes, I activated "Add Malwarebytes-Options to Windows Explorer".

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4 minutes ago, Lochkartenlocher said:

Windows seems to have turned Defender off automatically

Malwarebytes turns off Defender by default like any other AV program.

I would suggest turning off this setting in Malwarebytes so Defender will come back on.


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FYI regarding the message """VirTool:Win32/DefenderTamperingRestore"". When you install a third-party antivirus app, such as McAfee or Symantec or another name-branded A-V, the setting on Microsoft Defender as a "anti-spyware" is turned off. That is an expected & standard practice.
The turning off of the anti-spyware is what the Safety Scanner is flagging. This does not mean there is an actual infection.

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