Hi,
The Acer aspire started failing to boot Windows and I went into troubleshooting and refresh\reset fail as "a required drive partition is missing". I went in via command prompt and copied off files that hadn't backed up recently.
The first problem I had was trying to boot off a USB or CD recovery drive. The aspire was originally Windows 8 and I upgraded it ages to Windows 8.1. And it was running UEFI. I couldn't get it to boot off USB or CD despite going into the UEFI settings and turning off secure boot and putting the USB or CD at the top of the boot order. I also verfied the USB and CD recovery disks were bootable.
I then changed to Legacy Bios and I could boot off the USB or CD recovery drive fine then. I still couldn't get any recovery to work so I decided to rebuild it using a Windows 8.1 bootable DVD. I did a quick NTFS format on the primary volume and tried to install windows 8.1. The windows setup program failed with ''Windows cannot be installed to this disk. The selected disk is of the GPT partition style.".
So the primary partition is the GPT partition style which Windows 7 and above can use but only with UEFI! So I now appear to be stuck unless I try wiping the whole partition and formatting as an old style MBR partition and lose the benefits of a GPT disk.
If I change the BIOS back to UEFI then I fear I won't be able to boot off USB or CD again and then I may be stuck as it is appears to be difficult to get into the BIOS; the F2 key wouldn't take me into the bios when it was in UEFI mode it was only Windows failing to load that allowed me to get to the UEFI settings.
Also with the Legacy Bios on I see F2 on boot up and it beeps when I click this but it doesn't go into the BIOS. So I can't get into the BIOS to change it to UEFI. I tried downloading a BIOS update as I read that would reset the BIOS to UEFI by default. However the BIOS update is a 32bit program and failed to run under the Win PE 64 bit recovery enviroment.
This seems like a ridiculous state of affairs so I'm sure I must be doing something wrong. The questions I have are:
- How do I boot off a bootable USB disk or CD when the BIOS is in UEFI mode?
- How do I reliably access the bios in UEFI mode?
- How do I access the bios in Legacy Bios mode when F2 doesn't work. Can I run a BIOS update (under some 32 bit OS) to force it back to UEFI? Will this work? I have also set a bios passsword.
Thanks for any help or advice.