I'm having problems getting Win 7 installed. I followed the instructions in amohani's post -- downloaded the bios files, extracted, ran flash.bak, the command prompt screen popped up and ran through the processes. I restarted the pc and went into the bios settings, changed the settings as in amohani's post (turned off secured boot, changed CSM to always, changed boot priority to USB first, DVD second, hdd third). I made a bootable USB stick with Rufus. I also mad a bootable DVD using ImgBurn in case the usb method didn't work. Inserted the USB and rebooted. The Acer screen comes on and then goes to a black screen. The pc won't boot, so I tried the DVD and still nothing. I had to remove the battery on the mobo to get it to start booting from the HDD again. Any suggestions?
I too am having problems...I right-click the flash.bat and it quickly opens and closes a cmd prompt but it doesn't seem to actually change the bios. I went in and it says P11-BO version for the bios. I did a clean restore of the system and same problem. The bios from this forum is the only one that will work, correct? I am a bit confused now that maybe an official version from Acer is able to be used when downgrading to Windows 7?
Edit: Figured out to just double click the file instead of right clicking. Now when installing windows it says it cannot because it is in GPT. Do I need to format the drive or something? I followed the instructions and am using what I believe is a 64-Bit Windows Home Premium disc.
Last edited by xxxberto55; 18 Feb 2015 at 17:03.
TipError message when you boot from the Windows installation media in Legacy BIOS Boot Mode:
Windows cannot be installed to this disk. The selected disk is of the GPT partition style. (see screenshot below)
That is because Windows can only be installed to MBR disk in Legacy BIOS Boot Mode, but you plan to install Windows on a GPT disk.
- Boot from the Windows installation media in UEFI Boot Mode, so you can use GPT (GUID Partition Table).
- But if you want to use MBR (Master Boot Record) partition table, then delete all partitions on the disk.
Error message when you boot from the Windows installation media in UEFI Boot Mode:
Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks. (see screenshot below)
That is because Windows can only be installed to GPT disk in UEFI Boot Mode, but you plan to install Windows on an MBR disk.
- Delete all partitions on the disk, so you can use GPT (GUID Partition Table).
- But if you want to use MBR (Master Boot Record) partition table, then boot from the Windows installation media in Legacy BIOS Boot Mode.
Last edited by genet; 13 Nov 2015 at 13:37.
I am assuming from following the instructions that I was booting in UEFI Mode to a GPT disk but will double check.
I assume it's a setting in the bios?
Also, if I delete all the partitions on the drive, I assume I lose the ability to use the recovery software to return the computer to factory state?
Deleted all the existing partitions and it's a go! So the end result is running UEFI with AHCI, correct? SSD should be here today so probably will have to repeat but now I know how to do it. Thanks.
Cant seem to get it the graphic driver to work and cant get my hdmi to work. Can anyone help
This is the latest working video driver:
Get the latest audio and LAN drivers directly from the Realtek site.
As for other recent questions, no, don't use UEFI or GPT for Win 7 installs.
Also you can save some trouble by simply using the latest BIOS from the Acer support site a few posts up which you can easily run from within Windows.
And all the Win 7 64-bit drivers are finally available on Acer's site:
Download Drivers and Manuals | Acer Official Site
Last edited by mdavej; 28 Apr 2015 at 11:26.
Thank you amohani for your great post! I followed each step, and managed to get Windows 7 installed, up and running!
But ever since the update, I cannot access the BIOS again. I don't see the Acer splash screen logo, it just boots straight to Windows 7. I am using HDMI, and have been using HDMI from the start. But before the BIOS update I did not have any problems of seeing the boot screens or accessing the BIOS.
I also have a XC-603 NOT a XC-603G ...
1. Could it be that this "custom" BIOS disabled my access to the BIOS?
2. Is it safe for me to flash with the official P11.B2 BIOS, now that I have Win7 up and running? <-- will this let me access BIOS again,or can this risk a lockdown?