Windows 10: boot device blocked. cant install win7

hello. im trying to install windows 7 ultimate on a legion. the bios and boot manager doesnt workboot manager: blocks itbios: does nothingplease help.

:)

 

Windows 10, No Audio Output Device Is Installed


This is the only thing that worked on my ASUS N55SF dual boot system: Win7 on HDD (MBR) and Win10 on SSD (GPT).

Step 1
Assuming that you have already Win7 installed on your primary disk, install Win10 on your secondary disk.

Step 2
When install is done, enter your BIOS and go to the Boot section. There you should see "Windows Boot Manager" as your default boot option. Change it so that your primary disk (where you have Win7 installed) becomes your default boot option (it should be something like "P0:" followed by your disk model number, mine is "P0: ST9750423AS"). Save and restart.

Step 3
Now Win7 should start automatically (no boot manager showing up). Enter Win7, open an elevated command prompt and run
bcdboot X:\windows
where X is the Win10 system partition as seen from Win7, typically E, F, G or H.

Step 4
Restart. You should now see the Windows Boot Manager (probably the Windows 10 GUI boot manager). Select Windows 10, install your audio drivers (if you already have, I suggest you uninstall them and restart before doing this), restart and you're done.

Reference: Solved No Windows Boot Manager on dual boot system (7 10) - Windows 10 Forums

 

Boot Device not found

Hi Alan,

Corrupted system files or it boot to a different hard drive that it why you received the message Boot Device no found. To better assist you, we'd like to gather more information:

• Have you made any changes prior to this issue?
• Which build and version of Windows 10 are you using?

Meanwhile, we suggest that you follow these steps on how to perform automatic repair:

• Force turn off your computer/device 3 times until you reach the Automatic Repair environment.
• On the list of options under Advance options, choose Start-up Repair and perform the instructions.

Let us know if you need further assistance.

 

Unable to boot the device with error: 0xc0000428 on Windows 10

Hi Vuk,

Thank you for posting in Microsoft Community and being part of Windows 10.

I understand the inconvenience you are facing in booting the device with 0xc0000428 error. We will help you with this issue.

Do let us know the following to assist you better with this issue:

• What is the make and model of your device?
• What is the complete error message along with the error code of this issue?
• From when are you facing this issue?
• Have you make any hardware/ software changes to your device prior to this issue?

I would like to inform that when you attempt to start a Windows 10 system, the system fails to start normally and you receive an error:
0xc0000428 for the signed driver dlkmdldr.sys. Do confirm us if you are facing the same issue.

Try the below and check if it helps.

Step 1: I suggest you to remove all the external devices except mouse and keyboard, hard reboot the device and check if the issue persists.

Step 2: I suggest you to boot the device by choosing the "Disable Driver Signature Enforcement" mode from the advanced boot menu, you would be able to boot the system to the desktop.

• Try to boot the device to Windows Recovery Environment
• Click on Advanced options, Startup Settings
  and Restart.
• Once the computer restarts, press F7 key to start he device on
  Disable Driver Signature Enforcement mode.
• Check if the computer boot successfully.

Step 3: I suggest you to install the pending updates on your device after restarting the computer.

Steps:

• Connect to the internet.
• Press Windows key and type
  updates.
• Click on Check for updates.
• Under Windows Updates, click on
  Check for updates.
• Try to install the updates being shown.

Hope it helps. Try the above an update us the status of this issue to assist you further accordingly.