Windows 10: Many startup BSOD when I change bios settings

Hi
I have the board MSI B450 Carbon AC I bought recently and I have a strange problem, when I change some settings in the bios as I tried to OC the RAM I found out that it did not work so I reset everything again but my PC does not want to boot.

I get many BSOD like ntoskrnl or efi/sys files problem !! I reset the bios many times and some time it boot but next reboot it does not and some times I get black screen at startup. I really dont know what is the problem I installed windows 10 like 4 times and I reset the bios many times !! what is the problem ?

I though to disable Windows fast boot but this option is not visiable in my power options I think because I disabled hibernate.

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:)

 

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How to change BIOS Settings.

Hi,

Thank you for being a part of Windows 10 Insider Preview.

I appreciate you for providing details about the issue and we are glad to assist you.

I suggest you to follow the below steps to switch from IDE to ACHL and check if it helps.

• Press Windows key +
  R from the Keyboard.
• Type regedit and hit
  Enter.
• Browse to HKLM\System\CurrentControlSet\Services\msahci\
  
• Change the DWord value named "Start" from "3" (IDE) to "0" (AHCL)
  
• Shutdown the computer.
• Power the computer back on, making sure to enter the BIOS and change the SATA Operation to AHCL.
• Save the change.

Registry Disclaimer:

Serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry
if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 (http://support.microsoft.com/kb/322756/) How to back up and restore the registry in Windows.

BIOS Disclaimer:

Modifying BIOS/ complementary metal oxide semiconductor (CMOS) settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the
configuring of BIOS/CMOS settings can be solved. Modifications of the settings are at your own risk.

Hope this helps in resolving the issue. If issue persists, do get back to us. We will be happy to assist you.

Thank you.