uefi problems

ciland · May 2016

Hello,

Bios version v2.15

V3 571G 32348G50Mali

had problems with c partition and messed up things with partition program

i have now:

disk1 (GPT)

RECOVERY FAT16 300 mb GPT

NO FAT16 100 mb GPT/EFI

OTHER 128mb GPT/MSR

C Smiley Frustrated YSTEM NFTS 285.23 GB GPT (formatted empty)

D Smiley Very Happy ATA NFTS 180 GB GPT (containing data)

i am not able to install clean W10 on Cdrive because of legacy/uefi issues

- in bios on uefi and secure boot disabled, usb or dvd drive not reconigzed and getting errormessage

- in bios on legacy and secure boot disabled , both drives recognised but can't install W10 on gpt drive

i have bootable usb and dvd with W10

don't know what to do now, anybody can help

JordanB · May 2016

BTW, here's Windows 8.1 (free if your computer came pre-installed with windows 8.1)

http://windows.microsoft.com/en-us/windows-8/create-reset-refresh-media

Here's drivers/BIOS:

http://www.acer.com/ac/en/US/content/drivers

sharky25k · May 2016

Hello,

First how did you create the USB/CD? Did you use windows media creation tool to make these? Are you sure that they are bootable?

BIOS will not handle GPT drives, so no matter what you will try it will not work in legacy mode unless you convert GPT to MBR (but you lose all the data).

What error message do you get? Do you get a sort of windows or BIOS message? If it's a windows message and you have trubleshooting, I think there is an advanced option to select boot from CD/USB.

ciland · May 2016

Hi, thanks for your reply

i am sure USB and DVD are both bootable (checked on another pc)

Before things went wrong i didn't change anything in BIOS or on the type of drive being GPT

and had no problems with USB (DVD i can't recall because i never use it, do it on other pc)

I know legacy Bios can't handle GPT

as far as i can see it is a Windows errormessage errorcode 0xc0000225

bit difficult to translate the complete message but i says needs recovery but i don't have that

no bother for recovery only the data on d-drive i definitely want to keep!

in UEFI mode i can't use DVD or USB they are not recognized and each time receive the errormessage even after wiping and formatting c-drive (still is gpt)

out of options cause i can't change more in the bios and with uefi and secure boot dsisabled it should work as far as i know and not able to change anymore that seems necessary

sharky25k · May 2016

Hi,

The point is that the boot files are not on C: but on the FAT32 partition (or the other one, I am not sure, sorry) which is small (350 or 100 MB I am not sure which one). So basically these partitions are the ones which are responsible for windows boot manager.

May I ask you when you get the error it does not say anything like press "x key" for advanced settings/trubleshoot/startup settings? If it says something like this try to see if somewhere you will have some option to boot from USB/CD. I never had this issue, and right now I don't have right now a UEFI based computer to check the steps.

ciland · May 2016

You may ask anything i am gettig terribly annoyed by this

options esc to change uefi settings

return to try again

so if i wipe the other partition(s) it might work?

i even have a backup on another pc but if i don't have normal access to DVD and then network i can't restore

things

sharky25k · May 2016

Hi,

If you press esc I assume that it will get you into BIOS to change settings.

If you disable secure boot, will you have an option to change the boot order? If yes (In UEFI) select USB as the highest order or if you even can disable boot from HDD. I apologize, but since I don't have a UEFI computer I can just guess the options.

How I would try to do a workaround would be like this:

I would use reflect http://www.macrium.com/reflectfree.aspx and create a recovery USB drive.

Then I would boot this drive in legacy mode, use the drive to make an image of my D partition, (you will need an external HDD where to store the image) and then initialize the DISK as MBR.

Then I would just re-enable UEFI, and boot using windows 10 USB (hopefully it will work), and then reinitialize the disk as GPT and proceed with the install.

However, I am not sure it it will work, and I am not also 100% sure that if you format both of the small partitions the USB will boot. I can guess, I never tried but I know for sure that one of the drives contains boot files (windows.efi) because once, I deleted it using a linux USB, and ofcouse bricked the computer, but I had a backup so it was easy to restore it.

ciland · May 2016

thanks for your help but all you suggesting i think i already tried

i think i give up and goto computershop tomorrow trying things since yesterday and have enough of it

let's hope they rescue drive d and else well good learning case to have weekly backup of important data on other medium

if they give me the solution i will try to recapitulate it here for others

thanks again

JordanB · May 2016

If your computer came pre-installed with windows 8.1, maybe you can have the computer shop update your BIOS.

There's lots of posts on this forum on how to get your data from the drive.

There's lots of posts on this forum on how to clean install Windows 10. (use diskpart clean, and clean install to C: drive only)

I don't have your computer model, but apparently Windows 10 might work with the latest BIOS???? (assuming your computer came pre-installed with windows 8.1)

http://community.acer.com/t5/Windows-10/No-Windows-10-update-for-V3-571G/td-p/371846/page/3

http://www.acer.com/ac/en/US/content/drivers