Windows boot manager has been blocked by the current security policy как исправить

Ubuntu blocked by current security policy, solution inside Ubuntu rather than in BIOS

When I started my computer today, GRUB was blocked by this message :

I’m using a Lenovo Yoga, Ubuntu 18.04 LTS dual-booted with Windows 10. This window didn’t let me access to GRUB, even by forcing booting to Ubuntu by accessing the MBR menu (with Fn + F12 ). My lonely choice was an OK on that message, and the computer booted automatically on Windows 10.

So I disabled Secure boot into BIOS settings, and that solved the previous issue, BUT I would like to solve it inside Ubuntu rather than in BIOS. My BIOS is in UEFI mode.

Yesterday, nothing special done, just update (and I removed Jonathonf python 3.6 PPA, which removed public access with sudo add-apt-repository -r ppa:jonathonf/python-3.6 , because python packages won’t let system to update).

What must I change into Ubuntu parameters to avoid this issue? So I could re-enable Secure boot inside BIOS.

How could I solve this issue without disable Secure boot BIOS option?

how to fix window boot manager has been blocked by the current security policy on acerv5window 8.1

Sharanji ACE Posts: 4,320 Pathfinder

When do you xactly get this error message?

Are you trying to boot your computer using a cd?

Are you trying to load another operating system?

Secure Boot is a feature designed to prevent malicious software and unauthorized media from loading during the boot process. This option is enabled by default, but can be turned off in UEFI / BIOS.

Select your Windows 8 device and use the following steps to change the Secure Boot setting:

Completely shut down the computer.
Power on the system. As soon as the first logo screen appears, immediately press F2 to enter the BIOS.
Use the right arrow key to select Security.
Use the down arrow key to highlight Set Supervisor Password and press Enter.
Create a password and press Enter. Retype the password to confirm and press Enter again.
Use the right arrow key to select Boot.
Press the down arrow key to select SecureBoot and press Enter.
With the arrow key, highlight Disabled and press Enter.
Press the F10 key and select Yes to save the changes and exit the BIOS

FAQ & Answers

Sharanji ACE Posts: 4,320 Pathfinder

When do you xactly get this error message?

Are you trying to boot your computer using a cd?

Are you trying to load another operating system?

Select your Windows 8 device and use the following steps to change the Secure Boot setting:

Completely shut down the computer.
Power on the system. As soon as the first logo screen appears, immediately press F2 to enter the BIOS.
Use the right arrow key to select Security.
Use the down arrow key to highlight Set Supervisor Password and press Enter.
Create a password and press Enter. Retype the password to confirm and press Enter again.
Use the right arrow key to select Boot.
Press the down arrow key to select SecureBoot and press Enter.
With the arrow key, highlight Disabled and press Enter.
Press the F10 key and select Yes to save the changes and exit the BIOS

it solv my problem.

Excellent AAAAAAA +++++++++++++. Work Perfect

I fixed this issue when I realised I had set a passoword many months ago when I was in Windows 8.1

If you found that your BIOS is locked, use a password you’ve used for other ‘important’ things.

I have an Acer Aspire E1-571

I’m having the same problem — however when I press F2 it goes to a blue security box saying: Enter Current Password:

I don’t have a password. It was set by the factory, I bought it new. How do I get around this.

The last hard drive is trapped — I can’t fix it, even with Microsoft’s chat help when they accessed my computer remotely.

I bought a new hard drive, and have the Windows 7 Professional DVD in the drive — but it can’t access it under the current Security Settings — only to find it has a Password — thus my visit to this forum today.

Any help you can offer would be gratefully accepted.

What Occurs — Step by Step

1. Reinstalled OS from CD, purchased from ACER

2. Install complete, removed CD, system auto rebooted after the countdown.

3. When system restarted after auto reboot, I get «Windows Boot Manager has been blocked by the current security policy, Click OK

4. Get a message that states

«Default Boot Device Missing of Boot Failed. Insert Recovery Media and Hit any key. Then Select Boot Managere to choose a new Boot Device or to Boot Recovery Media»

5. Attempting the above takes me back to the initial «Windows Boot manager has been blocked. » message.

6. Power on + F2 and I am prompted for an Admin Password which I’ve never set.

Windows Boot Manager Has Been Blocked by the Current Security Policy — How to Get Rid of It?

If you are seeing the error message "Windows boot manager has been blocked by the current security policy" when trying to boot your Windows operating system, then your computer is preventing you from accessing the Windows boot manager. This error can occur due to a variety of reasons, such as incorrect system settings, malware infection, outdated drivers, or corrupt system files. In this article, we’ll discuss a few possible solutions to resolve this error and get your system up and running again.

Solution 1: Boot in Safe Mode

One of the simplest solutions to resolve the "Windows boot manager has been blocked by the current security policy" error is to boot your system in Safe Mode. Safe mode allows you to boot your system with a minimum of drivers and software running, which can help you to isolate the issue and identify any problems. To boot in Safe Mode, follow the steps below:

Restart your computer. When your system starts up, press and hold the F8 key.
Once the Advanced Boot Options menu appears, select Safe Mode and press Enter.
Wait for your system to load with the basic drivers and software required to start up.

Once you’re in Safe Mode, you can check if the error message still appears. If not, you can try to reset your system back to normal mode and see if the error reoccurs.

Solution 2: Disable Secure Boot

Another common solution to resolve the "Windows boot manager has been blocked by the current security policy" error is to disable Secure Boot. Secure Boot is a security feature introduced by Microsoft that prevents unauthorized code from running during system start-up. However, this feature can sometimes prevent the Windows boot manager from running. To disable Secure Boot, follow these steps:

Restart your computer and enter the BIOS setup utility.
Look for the Secure Boot option and disable it.
Save the changes and exit the BIOS setup utility.
Restart your computer and check if the error message still appears.

Solution 3: Repair Your System Files

If your system files are corrupt or damaged, it can prevent the Windows boot manager from running correctly. To repair your system files, you can use the built-in System File Checker (SFC) tool. Here’s how:

Open the Command Prompt with administrative privileges.
Type "sfc /scannow" (without quotes) and press Enter.
Wait for the scan to complete and follow the on-screen instructions to repair any corrupt or damaged system files.

Once the scan is complete, restart your computer and check if the error message still appears.

Solution 4: Perform a System Restore

If none of the above solutions work, you can try performing a system restore to a previous point in time when your system was working correctly. Here’s how:

Restart your computer and press F8 to access the Advanced Boot Options menu.
Select "Repair Your Computer" and press Enter.
Select your language and enter your login credentials when prompted.
Click on "System Restore" and follow the on-screen instructions to restore your system to a previous point in time.

Once the restore is complete, restart your computer and check if the error message still appears.

In conclusion, the "Windows boot manager has been blocked by the current security policy" error can be frustrating to deal with, but there are several solutions you can try to resolve the issue. If none of the above solutions work, you may need to seek professional help to get your system back up and running.

Fix Windows boot manager has been blocked by the current security policy

Most probably the error Windows boot manager has been blocked by the current security policy occurs after the re-installation of new operating systems. And it is most commonly experienced by the Acer and Lenovo laptop users.

This usually indicates a problem in the Unified Extensible Firmware Interface ( UEFI ). The UEFI is installed on all the new computers which intends to speed up the boot process. But the most important function of it is to provide a secure boot. For this purpose the UEFI performs a signature test. If the PC fails to pass this test the operating system will simply not load and display the error,

''Windows boot manager has been blocked by the current security policy''

Even after pressing Ok, the PC is going to restart and display the error again. By this way the UEFI can identify authorized operating systems. However there are numerous publicized solutions that you can try to overcome this error.

In this article, we will see the solutions for Fix Windows boot manager has been blocked by the current security policy. This can be tried for all the popular computer models.

Let's get started,

1. Reset BIOS

Basic Input Output System ( BIOS ) is the software which controls the computer's startup process. It essentially exists in every motherboard. Overtime a corrupted BIOS may be the reason behind this error. The BIOS can be corrupted due to many reasons. It can be either because of a bad update or due to a malware attack. Any boot error that occurs in your computer can be fixed by resetting the BIOS.

To reset BIOS,

1. Turn on the PC
2. Press F2 key immediately
3. Press F9 key to reset BIOS
4. Press F10 key to save and exit

2. Disable Secure Boot

Secure boot is a feature present in UEFI and the traditional BIOS. It protects the PC boot process by blocking any malicious programs from loading. Malwares especially the rootkits has the capability to replace the boot loader. Therefore, this could load your operating system with no any possible signs. Secure boot takes preventive measures from not loading them. However this feature is enabled by default which has proven to solve this error by disabling them.