Deleting Zone.Identifier Files: What We Know So Far

PC Repair Windows
Browser Window Folder

When you download files from the internet, Windows will automatically add an Alternate Data Stream (ADS) to those files. This way, your system will know whether it’s a suspicious file that needs to be dealt with right away or not.

What is an Alternate Data Stream?

An Alternate Data Stream is a unique feature of the New Technology File System (NTFS) of Windows. It contains metadata that is used to locate specific files by title or author. It is compatible with all Windows versions, starting with Windows 7.

In terms of security, ADSes are considered a hidden threat. This is because the information they store is hidden from us. We do not know whether or not they can affect or alter any characteristics of the particular files they are associated with.

For instance, adding a word to a file’s ADS does not increase its file size or even change its functionality. Because the real intent and purpose of ADSes are not known to users, they are taken advantage of by attackers, particularly developers of rootkits.

Pro Tip: Run a dedicated PC optimization tool to get rid of incorrect settings, junk files, harmful apps, and security threats that can cause system issues or slow performance.

Free Scan for PC Issues
Compatible with: Windows 10/11, Windows 7, Windows 8

Special offer. About Outbyte, uninstall instructions, EULA, Privacy Policy.

What is a Zone.Identifier?

Recently, Windows has introduced a new ADS called Zone.Identifier. What we know so far is that it contains a small bit of information about a file, such as “[ZoneTransfer] ZoneId=3”. Based on that info, it’s impossible to tell what to expect from a file. However, according to experts, Windows can tell whether a file was downloaded from the internet or not using this Zone.Identifier.

Because this whole Zone.Identifier files on Windows is relatively new, many Windows users are surprised to see a warning message telling them that because the file is downloaded from the web, it may pose serious risks and could be harmful to the device.

It is for that reason why some choose to remove the Zone.Identifier ADS. If you are among the many Windows users who would prefer to have the Zone.Identifier ADSes removed from their devices, then read on.

How to Remove the Zone.Identifier ADS

It is easy to remove the Zone.Identifier ADS from using File Explorer. Simply right-click on the file, choose Properties, and then click Unblock File.

While this method appears to be very easy, it can be quite time-consuming, especially if you need to delete multiple Zone.Identifier ADSes. This is because you have to perform the deletion steps on each file separately. Yes, one by one.

If you wish to unblock multiple files, don’t worry because you still have another option. Just make use of the Unblock-File Powershell cmdlet.

Here’s how:

  1. Open the folder where the file you want to unblock is located.
  2. Click on the file and choose Open Windows PowerShell Open Windows Powershell.
  3. Into the command line, input dir .\* | Unblock File.

At this point, you should have successfully cleared the Zone.Identifier from all the files in that specific folder.

What Actions to Take

Because the information contained in Alternate Data Streams like Zone.Identifiers remain hidden, you can never be too lax, especially when downloading files from the web. What you can do is always practice caution when online.

Here are some safety precautions you can take:

1. Use complex passwords

You’ve probably heard about this tip a hundred times before, and we’re repeating it one more time. Create a strong and unique password for all your accounts to keep your information safe. If possible, use a password manager to create strong passwords for your accounts.

2. Install anti-malware software

With anti-malware software installed on your PC, you can easily trace malicious items and remove them safely. You can also identify and delete cookies that only spy on your information and PC activities. Most importantly, you can also protect your PC from malicious objects and disable them on the spot.

3. Clean your PC

It is beneficial to clean your PC regularly to remove any suspicious items like malicious Zone.Identifiers hiding on your files and folders. And the best way to do this is by using a PC Repair tool like Outbyte PC Repair. This tool can effectively clear out junk files, such as user temporary files, corrupted Windows Update files, web browser cache, and a lot more, that are keeping your computer from performing well.

4. Keep your guard up

Stay cautious about the things you do online. Use a VPN service to encrypt your data and protect your information against the prying eyes of ISPs and government agencies. Also, back up your data regularly so you can easily recover in case something goes wrong.

5. Be smart

Do not invite danger by just carelessly downloading files online. Most online threats today are based on social engineering in which you are tricked into revealing sensitive information through click baits, online quizzes, and “free” offers. Be fully aware of these too good to be true deals and never reveal too much information.


Due to the secretive nature of the Zone.Identifier ADS, it is quite difficult to know what entity you are actually dealing with. Your best guard is to practice caution in everything you do.

Leave a Reply

Your email address will not be published.