Help with Win11 ISO installation needed

Before I overcomplicate this simple thing... You need to see the disk and the USB in the BIOS, right? If the "Windows Boot manager" is missing, then you can't find it because Linux is in it. I think at least. That's why you can still install Windows in it. So, you have to change it in the BIOS. As always, first short-circuit the CMOS battery for 30 seconds, which you take out first, then when you put it back, everything is plugged back in as it was. Why? Because you are trying to write the Windows Boot Manager to the disk. That only happens when you boot, that is, when you start setting up Windows from the USB. The disk, however, has Linux. If you still see the USB with Windows in the BIOS, then when the USB starts, you can write the Boot Manager to the disk with it.

Other Explanation´s:

Microsoft prefers the install to be coming from a Windows Machine, the Media Creation Tool, or as an update in OS to an existing Windows install. Any other ways are bad, no good, frowned upon nonsense

Windows can and WILL install the boot manager to the very first Boot Loader Partition it sees and will not tell you a thing about it until you go to boot from BIOS and you see “Windows Boot Manager” on a random hard drive you had never selected or touched.

Windows 11 checks for Trusted Platform Module

Various computers may have distinct BIOS settings, but they typically share similar boot options. To modify the boot sequence, access the BIOS menu, usually achieved by pressing the F2 or Delete key during startup. Once inside the BIOS, navigate to the "Boot" or "Boot Sequence" settings.

Within these settings, you'll find a list of all bootable devices or methods and their current sequencing. Adjust this sequence to align with the method you intend to use for Windows installation. For example, if you're utilizing a flash drive, set it as the first primary boot drive in the sequence.

Once you've made the necessary changes, save them and proceed with restarting the computer. By doing so, the issue will be resolved, and you'll gain access to the Boot Manager as desired.

During system startup, your computer might detect removable media such as USB flash drives or external hard drives as bootable devices. This can cause confusion and result in a situation where no boot options are available. To tackle this issue effectively, follow these steps:

Step 1. Remove any USB flash drives or external hard drives from your computer.

Step 2. Restart the computer to see if the problem persists.

If the error still occurs, please carefully unplug the main USB cables connected to the PC motherboard. This action will permanently disconnect the problematic USB device.

Without a hard drive, accessing the boot manager becomes impossible. If your computer is unable to detect the hard drive, it is possible that the power and data cables connected to it have been dislodged or misplaced. As a consequence, a "missing boot manager" error may occur.

To rectify this issue, follow these steps:

Step 1. Open your computer case carefully to gain access to the internal components.

Step 2. Locate the hard drive and identify the power and data cables connected to it.

Step 3. Proceed to restart the system by unplugging and then re-plugging these power and data cables. By doing so, any potential data or power glitches will be resolved.

Step 4. After completing the cable adjustments, power on your computer and observe the boot screens.

A "missing boot manager" error may arise if there is corruption or boot damage in your partition, particularly in the Windows partition. Such issues could be attributed to various factors, including an aging hard drive, virus infections, or malware attacks. In such cases, we highly recommend creating a new boot sector using the following method:

Step 1. To begin, access the start menu and search for "Command Prompt."

Step 2. Right-click on the Command Prompt option and select "Run as administrator." This step is essential to enable developer configurations.

Step 3. Once the Command Prompt opens, input the command "bootrec /fixboot" and press enter.

Step 4. After executing the command, you will see the message "Operation completed successfully."

Step 5. Now, restart your computer using the "Ctrl + Alt + Del" keys, and then selecting the restart option.

Note: Before restarting your computer, ensure that all removable devices, such as USB drives or external hard drives, are disconnected from your system.

If your boot configuration data (BCD) is missing, corrupted or misconfigured, then you have to rebuild it to remove the “Windows boot manager is not showing in BIOS” error. Boot configuration data is the primary key to opening the boot manager. If you don't have it, you won't be able to access the manager or even view the option.

Step 1. First, open the Start menu, type "Change Advanced Startup Options," and hit enter. Here, select"Restart now" in the advanced startup option. You will be redirected to the advanced options menu.

Step 2. Now select "Troubleshoot," then select "Advanced Options".

Step 3. Select "Command prompt" in the next menu and wait until cmd Prompt opens.

Step 4. Now type "bootrec/rebuildbcd" and hit enter. It will take a few seconds if you see a successful installation message. In the final step, you have to adjust the attribute files.

Step 5. Type "attrib c:\boot\bcd -h -r -s" in the same command prompt and hit enter. It will remove the read-only and hidden files from the Windows bcd. Now execute another command, "ren c:\boot\bcd bcd.old," to rename the stored bcd. Now you have access to rebuild the bcd file.

Step 6. Now again, type "bootrec /rebuildbcd" and hit enter. This time it will ask to add a boot to the list. Type"Y" and press enter. Wait for a few seconds until you see the "Operation successful" message on the screen.

Step 7. Restart your computer, and now you will be able to access the boot manager.

The boot menu plays a crucial role in managing BIOS and other essential functions of your computer. On the other hand, the boot manager appears on the startup flash screen, but it is often not visible because it is usually turned off by default. However, you can easily enable it using simple Command Prompt commands.

To turn on the boot manager, follow these steps:

Step 1. Open the start menu and type "cmd" to search for the Command Prompt.

Step 2. Right-click on the Command Prompt icon and select "Run as administrator" to ensure you have the necessary system privileges.

Step 3. In the Command Prompt window, type the command "bcdedit /set {bootmgr} display bootmenu yes" and press enter.

Step 4. Upon executing the command, you will receive the "Operation successful" message on the screen.

Note: Always run the Command Prompt as an administrator to access system settings effectively.

(For example, if you don´t see the hard drive-in bios, no problem, because during installation, you will find it with the USB.)