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If you receive Critical Error 15269890 (also known as “This driver has been blocked”) when attempting to run the loader, it means Windows is blocking the required driver from loading.

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Cause

Blocked Windows Driver PolicyWindows is enforcing a driver-blocking policy that prevents our driver from loading. The Driver Unblock tool removes only these specific policy files so the driver can load again.

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Solution

To resolve this issue, you must run the Driver Unblock tool to remove the blocking policy files.
1

Download the File

Download the Driver Unblock tool to your Desktop.

Download Driver Unblock

Click here to download the Driver Unblock tool.
2

Run as Administrator

Right-click the file and select Run as administrator.
3

Press Option [2]

Press option [2] to apply the removal.
Secure Boot: If Secure Boot is enabled, it will be displayed. Disable Secure Boot in your BIOS, then run option [2] again.BitLocker: If BitLocker encryption is enabled, you must disable it before continuing.
4

Wait for Completion

Let the tool complete. It will display a success/failure output when it finishes.
5

Close and Delete the File

Close the tool and delete the file from your Desktop.
6

Restart Your PC

Restart your PC and try the loader again.