How to Fix the BrUsbSIb.sys Incompatible Driver in Core Isolation

Is the BrUsbSIb.sys driver causing Windows 11 memory integrity to not be enabled? This article provides a solution!

The core isolation of Windows 11 is effective against security threats, while memory integrity further prevents applications from accessing memory areas that they do not have permission to access. However, when trying to enable memory integrity, you may encounter an error message that "BrUsbSIb.sys incompatible driver prevents memory integrity from running".

A Reddit user also encountered a similar problem:

Is there any way to remove the BrusbSib.sys incompatible driver? That way I can enable memory integrity? It doesn't have OEM numbers like the other two drivers I deleted. I haven't used a Brother Brand printer for more than a year, and I have deleted all printer-related content. I searched everywhere for something hidden, but found nothing.

Related problem solutions:

• Ftdibus.sys Issue Fix Guide
• Wdcsam64.sys memory integrity error repair method
• Wdcsam64_prewin8.sys core isolation shutdown repair method

How to fix the incompatible driver issue of BrUsbSIb.sys?

Method 1: Enable Virtualization Based Security

1. Press Windows R to open the Run Command window, enter gpedit.msc and press Enter .

2. Navigate to the following path:

Computer Configuration > Administrative Templates > System > Device Guard

3. Find the Turn On Virtualization Based Security option and double-click.

4. Select the Enabled check box, and click Apply and OK to save the changes.

Method 2: Uninstall the relevant drivers of BrUsbSIb.sys

Uninstall the BrUsbSIb.sys-related driver via the command prompt.

1. Enter Command Prompt in the search box and select Run as administrator .

2. Enter the following commands and press Enter after each command:

• dism /online /get-drivers /format:table
• pnputil /delete-driver oem21.inf /uninstall /force

Method 3: Uninstall Brother software and printer driver

Many users reported that uninstalling the Brother Card software can solve this problem.

1. Search the Control Panel in the search box and open it.

2. Navigate to the Programs and Features section and click.

3. Find Brother Card software in the list, right-click and select Uninstall .

4. Follow the on-screen instructions to uninstall the Brothers software.

Summarize

This article describes the meaning of BrUsbSIb.sys and how to fix driver incompatibility errors it causes. You can try the above method to solve this problem. If you have other solutions, please share them in the comment section.

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