ASUS X99- Unable to get to Windows after configuring in the BIOS

Dorsey · Jan 4, 2016

How do I get back into Windows from the BIOS? I save and exit the BIOS and it goes right into an ErrorCode A2 and or 90 and it stays there with a caption: Do not shut down or reset to prevent system bootup failure.

Puff3r · Jan 4, 2016

What changes did you make in the BIOS? Have you tried resetting the BIOS to defaults?

Dorsey · Jan 5, 2016

Hi Puff4r, Dorsey here. I've tried numerous times through CMOS, changing the boot priority, changing the controller mode from ACHI to RAID back and forth, changed Option ROM Messages from Forced BIOS to Keep Current and back again. Also, in TOOLS> Forced BIOS2 BOOT > BIOS1. I get nothing. Any help would be appreciated. Thanks

Puff3r · Jan 5, 2016

First, do not change the controller mode unless you intend to reinstall Windows. I am assuming that Windows was working well and you tried to change a setting in the BIOS leading to the problem you are having now. Is this correct? If so, what setting did you change in the first place before you got the error message the first time?

Dorsey · Jan 5, 2016

Hey. Windows was working well. Then it froze. The only way out was to hard start, and through the booting process, it went staright to the previous message. Do not shut down.

Puff3r · Jan 5, 2016

Do you have the Windows install media handy, USB or DVD? Boot to it and choose Advanced features to try a Startup Repair. What version of Windows for a detailed walk thru if you need it.

Dorsey · Jan 5, 2016

No, I do not. This version of Windows 10 was a freebie. I was one of the first that got in on the free download from Microsoft.

Puff3r · Jan 5, 2016

You can download a copy of Win 10 from MS and create boot media for the system.

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

Choose Download Now to get the Media Creation Tool. You will need a 4 GB USB stick or larger to create the USB drive, or a blank DVD.

http://www.tenforums.com/tutorials/2294-advanced-startup-options-boot-windows-10-a.html

Detailed steps to get into Advanced options for Startup Repair in Windows 10.

Dorsey · Jan 5, 2016

Sorry guy, in the process of downloading windows 10 on a flash drive. Also checking out tenforums Windows 10 Repair Tool.

Puff3r · Jan 5, 2016

No worries. Keep us posted. If I drop offline someone will jump in, or I will reply tomorrow morning.

Dorsey · Jan 5, 2016

Is there any particular start-up Option I should choose from 1-6 on tensforum?

Puff3r · Jan 5, 2016

5 is for booting from the USB/DVD media.

Puff3r · Jan 5, 2016

From the Repair menu You will choose Troubleshoot --> Advanced Options --> Startup Repair

Dorsey · Jan 5, 2016

Tell me, should I be in the BIOS to start this process or just plug it in and start the pc?

Puff3r · Jan 5, 2016

Depends on how your boot order is setup. You should have the option to select a boot device or boot media during the POST. If not just change the boot order in BIOS to boot to the USB first and all should go well.

Dorsey · Jan 5, 2016

Okay.

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ASUS X99- Unable to get to Windows after configuring in the BIOS

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