Error 604: Disable the Vulnerable Driver Blocklist

Resolve error 604 by disabling the Microsoft Vulnerable Driver Blocklist.

Error 604 usually means Windows is blocking a required driver.

The common cause is the Vulnerable Driver Blocklist.

This changes a Windows security setting.

Only do this if support instructs you to.

Fix

1

Open Windows Security

Use Start menu search.

Open Windows Security.

2

Open Device security

Select Device security.

3

Open Core isolation details

Open Core isolation details.

4

Disable the blocklist

Turn off Microsoft Vulnerable Driver Blocklist.

5

Restart

Restart your PC.

Retry after reboot.

If the toggle is missing

Your Windows build may not expose the option.

Open a ticket and share your Windows version.