Intel Motherboards - Windows Defender quarantines Z170M Extreme4 BIOS

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Windows Defender quarantines Z170M Extreme4 BIOS

Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=8068
Printed Date: 03 Aug 2025 at 7:56pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Windows Defender quarantines Z170M Extreme4 BIOS

Posted By: Pheran
Subject: Windows Defender quarantines Z170M Extreme4 BIOS
Date Posted: 15 Mar 2018 at 10:27am

I just download BIOS update 7.40 Windows version for the Z170M Extreme4. I opened the zip file and dragged the EXE onto my desktop (Windows 10). Windows Defender immediately quarantined the EXE file with this message.

Trojan: Win32/Cloxer.D!cl

Alert Level: Severe
Status: Quarantined
Date: 3/14/2018

Recommended action: Remove threat now.

Category: Trojan
Details: This program is dangerous and executes commands from an attack

Learn more

Affected items:
file: C:\Users\xxxxxxx\Desktop\z17mx4_740.exe

This might be a false positive but I'm certainly not going to try running it until I'm sure!

Replies:

Posted By: wardog
Date Posted: 15 Mar 2018 at 10:33am

Lemme check. brb

Posted By: wardog
Date Posted: 15 Mar 2018 at 10:36am

Too, duh me. I'm baaaaaack ......

Never flash within Windows. That is asking for a bricked motherboard/BIOS.

Download and use the Instant Flash file.

We're big enough to build our own, we're big enough to use Instant Flash. Wink

Posted By: wardog
Date Posted: 15 Mar 2018 at 10:38am

ps: That isn't a false positive.

A Windows executable that can access a system at low levels will always flag AV.