If you find that the Attachments key is already present, you can skip to the next step. Name it "SaveZoneInformation" and click Enter. Finally, to disable the Attachment Manager in Windows 10, double-click on the newly-created SaveZoneInformation value and change its value data to 1. Click OK to finish. When you complete these steps, close the Registry Editor and restart your computer to apply the changes.
From here onward, any file you download will no longer attach Zone Information to the file's alternate data stream. This will allow you to open your files without any difficulties. From here, on the right-side, double-click on the SaveZoneInformation value and change its value data to 3.
If you're using a Windows 10 edition that has the Local Group Policy Editor, you can configure the Attachment Manager using the steps indicated here. In the right pane of the Attachment Manager, double-click on the Do not preserve zone information in file attachments policy to edit the Zone Information settings. Let's change this behavior to get rid of this warning. If you disabled Smart Screen, another warning message can appear with this text:.
THe use have to unblock the downloaded file as mentioned here: How to unblock files downloaded from Internet in Windows If you want to completely prevent Windows from adding the zone information in the file's alternate data stream so you don't even need to unblock such files, follow these steps:. If your Windows 10 edition comes without the Group Policy app, you can apply a simple Registry tweak instead:.
If you don't have such a key, then just create it. When you try to open a file, Windows 10 might prevent you from opening it directly. This happens when a Windows 10 feature called the Attachment Manager blocks files that it considers unsafe for your PC. While you could manually unblock each file, this can be a tiring process—especially if you have to do it for almost every file you download. If the Attachment Manager considers a file unsafe, it prevents Windows 10 from opening it and displays a warning message.
The Attachment Manager classifies files that you download based on the file type and the file name extension. Windows Attachment Manager uses the IAttachmentExecute application programming interface API to find the file type, the file association, and to determine the most appropriate action to take. When you download files and save them on your disk, Windows adds specific metadata to these files. These metadata are considered to be attachments. When Windows adds metadata to the download files as an attachment, this is known as Zone Information.
Now, the Zone Information is where the root of the matter lies. When File Explorer opens a file, it reads the attached Zone information stored in the same location and checks to see if the file came from an unknown source or not. Let us instead focus on the preventive measure and stop the windows from adding additional Zone information. No zone information means no smart screen security warning and no need for unblocking the download files.
In case your Windows 10 editor does not come with the Group Policy apps, you can go for a simply Registry optimization. Step 2 — Type in regedit without quotes and press Enter key from Keyboard. Name this SaveZoneInformation. Click on Local group policy editor icon on the search result.
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