Myself locked out Windows (by accident, oops!)

So, I wanted to set up a dual-boot between Windows 8.1 (update 1) and Ubuntu for Android development on my Acer Aspire V5-571P-6429, rather than using a Virtual Machine and have to share resources. I went to change my settings for UEFI and changed for Legacy UEFI BIOS to disable startup secure, then apply changes and away I went. Or so I thought. I got the PCIE splash screen and if I cancel it, or if it fails (which always happens), he continues to say the operating system is not found. I've seen different solutions, such as here:

http://community.Acer.com/T5/notebooks-netbooks/aspire-V5-571-quot-operating-system-not-found-quot/m...

.. .that mention to press F2 at the STATION. I tried which, like all the other keys F on my keyboard. I even plugged a second keyboard to make sure it was not defective or something and none of it works. I'm basically locked in the BIOS and Windows 8.1. I'm running on an Ubuntu Live CD (I can access all my readers, including files on my internal drive, so he didn't there absolutely no problems with the drive or disc hard themselves), so I'm not completely in the dark, although I'd really like to have access to Windows 8.1. I have a USB key with an 8.1 on this installer, but I would really like to make sure that I can reset my BIOS first before having to start Ubuntu, once more and save all my files (which I wouldn't do, because I don't really feel like immediately wipe). 8.1 installer doesn't have an option to let me access the UEFI settings, either. All I have is a command prompt.

Is there anyway I can force me access my BIOS/UEFI (don't know what the right term to use is here) and return this change? Even if I can just reinstall the BIOS to reset to the default values, or some kind of loophole bit I can use (like a kind of miracle Live CD), nothing to keep me from wiping and reinstalling would be the best.

Oh and needless to say I probably won't touch this setting never after this correction. I'll probably find a few other laptop to install Ubuntu on as griddle not this one.

So I decided to look into the BIOS update files, and I managed to extract the files from the most recent BIOS update the firmware using 7 - Zip, then I manually installed the files using the applications is it came with, WinFlash32.exe within the environment that took my USB W8. It reset my default BIOS settings and allowed me to join Windows again!

For those who have the same problem I had, do the following:

1. install 7 - Zip on a secondary computer.

2. open the installation file (mine was VA410218.exe) in 7 - Zip (this is a 7-Zip self-extracting file) and extract the files to a second drive.

3. open the file launch.bat in a text editor, then took the USBs and they inserted into my laptop and starts windows 8 USB. I went to the repair of Windows, then open a command prompt.

4. I typed in F:/WinFlash32.exe/bcp/SD /ver /cvar /v/endkey / / silent bbl /cac /cbp 30/line F:/BIOS.cap, plugged my laptop, and then press ENTER. (NOTE: the F drive may change depending on your computer.) Try a few different drives and try the 64-bit version, WinFlash64.exe, as well.)

5. let it do its thing and it restarts, then flashed the BIOS image.

6. he restarted once more and restarted correctly in Windows 8.

Tags: Acer

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