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PS23
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Boot Windows

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HP Pro Desk
Microsoft Windows 10 (64-bit)

Hi, i tried to dualboot linux with win10 pro but i think  i did something wrong annd win10 is gone.

When power on it appears a black screen with uefi diag , what should i do ?

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TheOldMan
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Since Windows 10 Pro was installed first, then most likely it is still there but to verify that use the Linux OS to look at the hard drive to see if the files are still present.  I suspect the Windows boot loader was either corrupted or rewritten by the Linux.  Here is a guide for dual- boot Ubuntu with Windows but that should not matter

https://itsfoss.com/install-ubuntu-1404-dual-boot-mode-windows-8-81-uefi/

Or the same guide with Linux Mint

https://itsfoss.com/guide-install-linux-mint-16-dual-boot-windows/

 

If Windows 10 Pro is really gone, then it will need to be reinstalled, using install media.


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PS23
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Hi and thx , how to check if the win10 is still there , btw i am on black arch

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TheOldMan
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Well, I did some research, because I am not familiar with that brand of Linux.  It says "BlackArch is a complete Linux distribution for penetration testers and security researchers.

The typical Linux, such as Ubuntu or Knoppix, you can make a Live USB/CD version and boot to that to do exploring of the hard drive to see files, Etc and whatever, even web browsing.  So, I would suggest you do that either with the BlackArch or whatever Linux you choose. 

If the Windows install is there, then you need to repair the boot loader With the Windows 10 install media.  Pick "Repair this PC" instead of install when the media boots.  Here is a guide

https://pureinfotech.com/repair-master-boot-record-mbr-windows-10/

 

Skip the advertising and go to the How to repair the Master Boot Record.  Step #1 is to create Windows 10 bootable media.  You can do that by going here on a working PC

https://www.microsoft.com/en-us/software-download/windows10

Scroll down to the "Using the tool to create installation media" then follow the directions.  Then boot the problem PC to that new media and continue on with the steps.


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