Speed ​​up your email by preventing windows defender from analyzing attachments

Currently one of the operations that we do most with our computer is to use our favorite email client. It is undoubtedly a widely used method to send different types of documents as an attachment. Surely we have noticed on more than one occasion that when we are about to open any attached file, Windows will be in charge of analyzing it previously either with Microsoft Defender or another antivirus, something that some users can be annoying.

If we are users who constantly receive emails with attachments for work reasons, we find ourselves with the annoyance that they have to go through the antivirus every time we want to access them. This is done for our own safety, although it may not be to our liking.

Why Windows Defender Scans Attachments

Windows takes care, through Defender or the antivirus that we have installed, to scan any attached file that comes to us by email automatically. This task is done to ensure our safety. Since ransomware is one of the biggest threats to our computer and it spreads easily through attachments. And is that this powerful malware is responsible for restricting access to certain parts or files of the infected operating system, asking for a ransom in exchange for removing protection. That is why it is always convenient that we never open attachments in the event that we do not know their sender and always have an up-to-date backup of our most important files.

But, if, for some reason, we do not want Windows Defender to take care of analyzing our email attachments, we must know that there are ways to disable it. It is possible to disable this security function in Windows 10, and carry it out in two different ways. For this we can use both the “Registry Editor” and the “Windows Group Policy Editor” as we will see below.

Disable attachment scanning by using Windows Registry Editor

One of the options we have to prevent Windows Defender from scanning the attachments that come to us by email is to use the Windows Registry Editor . Thanks to this editor, both system administrators and people with advanced computer skills can review any type of configuration of the different system parameters.

In order to access the Registry Editor, press the “Windows + R” key to open the “Run” tool. We will write “regedit” and click on “OK”. Once in the registry we must navigate to the route:

HEKY_CURRENT_USER / SOFTWARE / Microsoft / Windows / CurrentVersion / Policies / Attachments

In the event that within the «Policies» folder we cannot find the «Attachments» folder, we must create it . To do this, we right-click on «Policies», access «New», then go to «Password» and assign it the name «Attachments». Next, we right-click on “Attachments”, select “New” and “DWORD Value (32 bits)” and name it ScanWithAntiVirus. Now we double click on ScanWithAntiVirus and set the value data as 1 and click OK to save the changes. Setting 1 as the value will disable the attachment scanning feature.

Re-enable attachment scanning

In case we want to re-enable the analysis of attachments we must return to the path HEKY_CURRENT_USER / SOFTWARE / Microsoft / Windows / CurrentVersion / Policies / Attachments

We will double click on ScanWithAntiVirus and in the value information we will put 3 . This will enable scanning again.

Disable attachment scanning via Group Policy Editor

The Windows Group Policy Editor is a powerful tool with which we can enable or disable access to different hardware and software parameters of the system, allowing us to obtain a more controlled administration of the use of the system. Through group policies, we can edit advanced values ​​at the computer level and user accounts that are not configurable from the Control Panel.

Access the editor with the gpedit.msc command

Therefore, through the Windows 10 Group Policy Editor we can disable the option for Windows Defender to examine attachments, stopping the analysis of emails when we open them. To do this, we must follow the following steps:

The first thing to do is to activate the “Execute” command, for this we will press the keyboard shortcut “Windows + R” and type “gpedit.msc” and click on “OK”. Once the editor is open, we will navigate to the following route:

User Configuration> Administrative Templates> Windows Components> Attachment Manager

Then, on the right side, in the first of the settings it says “Notify antivirus programs when attachments are opened” . Click on it and on the left side click on “Edit policy settings”, a new window will appear. Now we will click on the “Disabled” box, and finally on the “Apply” and “OK” buttons.

In this way, using the policy configuration editor we have been able to manage the behavior to notify registered antivirus that we do not want them to scan the attached files . In the event that we have several antivirus, the notification will affect all of them. When disabling the policy setting or if we leave it marked as “Not configured”, Windows will not notify the installed antivirus when we decide to open any attached file of an email.

Re-enable policy settings at any time

In the event that we want to enable the “Notify antivirus programs when attachments are opened” function, Windows will tell the antivirus to scan an attached file when we open it. In case the antivirus fails, the opening of said file is blocked.

When we want to enable this option, we will have to reopen the “Group Policy Editor” and access the path:

User Configuration> Administrative Templates> Windows Components> Attachment Manager

On this occasion, when editing the configuration of the directive we must mark the option “Enabled”, click on “Apply” and “OK”.

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