What is Process Isolation in Microsoft Edge and How to Enable or Disable it in Windows 11

Want to boost your Microsoft Edge security? Process Isolation might be exactly what you need. If you've been looking for ways to tighten up your browser's defenses without making drastic changes to how you work, Process Isolation could be your answer. It's a straightforward security feature that works quietly in the background, and the best part? You have complete control over whether to use it or not.

What's Process Isolation in Edge Browser

Think of Process Isolation as creating separate, walled-off spaces within Microsoft Edge. Instead of having everything run in one big area, different browser functions—your tabs, extensions, and other processes—each get their own independent environment.

Here's why this matters: if something goes wrong in one of these spaces, it stays contained. Say a sketchy website manages to compromise one of your tabs. With Process Isolation enabled, that malicious code can't just hop over to your banking tab or dig into your stored passwords. The damage stays isolated.

More specifically, Process Isolation prevents attackers from:

• Stealing sensitive data like passwords, credit card information, or banking details that Edge has access to
• Manipulating Edge's internal processes to gain control of your browser or computer
• Accessing encryption keys that protect your secure connections

For most people, enabling this feature gives you genuine peace of mind without any noticeable changes to your everyday browsing experience.

Note that Process Isolation is available with Microsoft Edge version 151 and up. Here is how to turn on/off this feature.

How to Turn On Process Isolation in Edge

1. Open the Registry Editor as administrator in Windows 11.

2. Now, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge

3. If the Edge folder doesn't exist yet, right-click on "Microsoft," select "New," then "Key," and rename it to "Edge."

4. Next, with the Edge key selected, right-click in the empty space on the right pane. Choose "New," then "DWORD (32-bit) Value." Name it exactly: ProcessIsolationEnabled

5. Next, double-click the ProcessIsolationEnabled entry you just created. A dialog box will pop up. In the "Value data" field, type 1 and click OK. 

6. Close Registry Editor and relaunch Microsoft Edge. Your new setting will be active immediately.

How to Test Process Isolation

Press Shift + Esc inside Edge to view the individual processes running, or use Ctrl + Shift + Esc in Windows to see the full task manager breakdown.

How to Turn Off Process Isolation in Edge

If you decide Process Isolation isn't for you—maybe you're experiencing compatibility issues with other applications—disabling it takes just a couple of minutes.

1. Open Registry Editor as Administrator again and navigate back to:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge

2. Find the ProcessIsolationEnabled entry and change its value from 1 to 0. Click OK and you're done.

3. If you want to completely remove the setting instead, right-click ProcessIsolationEnabled and select "Delete." This tells Windows to go back to managing Process Isolation automatically.

The Bottom Line

Process Isolation is one of those security features that works best when you don't have to think about it. You get an extra layer of protection against malware and data theft, while your browsing experience stays exactly the same.

Whether you decide to enable it or leave it to Windows' default settings, you now know exactly how to control it. That kind of control over your own security is always a good thing.