What is PortableBaseLayer and Why is it Needed?

If you’re using Windows 10 or 11, you might have noticed a partition named PortableBaseLayer in your disk management settings. This partition often raises questions among users: what is it, and can it be removed? Let’s dive into the details.

What is PortableBaseLayer?

PortableBaseLayer is a virtual disk created by Windows when you enable certain security features, such as Windows Sandbox or Windows Defender Application Guard. These features allow you to run applications in an isolated environment, providing extra protection for your main system from potentially harmful software.

Why is this Partition Needed?

PortableBaseLayer contains the necessary files for these isolated environments to function properly. For example, when you activate Windows Sandbox, the system creates this partition to house essential components needed for the sandbox to operate. The partition typically takes up about 8 GB of space, though this may vary depending on your usage.

Can You Remove PortableBaseLayer?

Removing this partition manually is not recommended, as it could disrupt the functions that depend on it and even cause issues with your main system. If you no longer plan to use Windows Sandbox or other related features, you can disable them through the Control Panel, and the system will automatically remove the PortableBaseLayer partition.

How to Disable Windows Sandbox

1. Open the “Control Panel” and go to “Programs and Features.”
2. Click on “Turn Windows features on or off.”
3. Uncheck the box for “Windows Sandbox” and click “OK.”
4. Restart your computer to apply the changes.

After following these steps, the PortableBaseLayer partition should disappear.