Notebooks & Netbooks

[jlan421]

I have an Acer V5 571 touch running Windows 8, I went to the BIOS and changed from boot EUFI mode to Legacy BIOS mode and disable secure boot. When rebooted,  i got the F2 / F10 prompt, selected F2 (BIOS setup) but did not go to the BIOS settings, instead it looks like it went ahead and tried booting an OS then started getting "Operating System not found" error.   All the Windows 8 partitions stil exists, looks like windows 8 doesn't boot with Legacy BIOS mode, so I would like to change the boot mode back to EUFI but cannot do so since i cannot access the BIOS. Any help is much appreciated.

Thanks,

-jsl

[MartinF]

Hi

You should still be able to get to BIOS.. try again, maybe you mistimed it?

Once in change it back to UEFI and you should be OK

[jlan421]

I tried it several times, still going to its boot process (ex, pxe boot, etc) then getting the OS not found error. I also tried F10 (boot devices menu) and that is working, i can boot from dvd or usb.

[MartinF]

Turn it off, turn it back on again.. as soon as the blue light comes on the power button, hammer F2 over and over.. I just tested it on my V5 and it let me back in to BIOS to switch it back to UEFI fine

[jlan421]

still the same, seems the BIOS got corrupted somehow, anyway i can reflash the BIOS on this laptop?

[MartinF]

Hmm, strange - sorry it didn't help.

You could but seems like the UEFI BIOS downloadable from the Support site is only for Windows.. which doesn't help as you can't boot Windows.

You could try to run it from a bootable DOS USB Stick but probably wont work?

Could you make a bootable BartPE environment or similar and run the BIOS update from that?

You could install Windows 7/8 on the HDD in Legacy Mode, then flash the BIOS but that will mess with the original config of the HDD unless you have another one to put in temp, install windows, flash bios to uefi, then put the old hdd back in.

If none of that works or you don't feel comfortable doing it then probably best to get it in for repair.

[jlan421]

Ok, thanks for the advice, will probably try to install win7 on another hdd then flash the bios that way and put pack the original hdd and see if windows 8 boots up.

[MartinF]

Okay good luck! May be worth trying F2 for the BIOS on a USB Keyboard first just in case it is  simple keyboard issue.

[jlan421]

Seems to be working after re-flashing the BIOS, now trying to do Windows 8 factory default restore from backup usb.

[AlvinLasut]

GUYS!! i need help. I had Acer Aspire v5-471PG, and i got the OS not found problem too, but i cant go to BIOS. And i already pressed all what people said to get in BIOS.
I got the problem because i changed UEFI to Legacy BIOS. Pls guys, Help me.