I was planning to reinstall Windows 8.1 on my laptop. I did by using a usb flash drive by using the legacy bios boot mode because it will not boot from it on uefi. It Installed perfectly but every time it started up it will be in legacy bios. 2 days after I tried to start it up by came up with the message os not found. I have tried f2,f8, f10 and f12 neither have worked. I cannot access recovery. I hope their is a solution to this as soon as possible because I need my computer back by next week

  1. Acer Windows 7 Laptop Computers
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  1. Berikut ini adalah cara Download Driver Acer dan install Driver Acer di laptop Acer model apa saja. Tentu setiap melakukan Install ulang baik itu notebook, laptop, PC dan komputer pastinya driver yang ada di komputer akan hilang karena proses install.
  2. Min gimana cara instal windows 7 di Acer Z1401-C9UE soalnya pas masuk di pembagian partisinya tombol next. Jadi sya lepas HDD nya saya install di laptop.
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My accer aspire IV5 is not entering bios, it only display operating system not found when trying to enter the bios

Mine after update to Windows 10 I have this problems f12,f10,f2,del can't enter bios .second update give a few seconds the blue screen appear ,can't restore to win8 removed bios battery to reset bios settings to reinstall Windows ,now operating system not found .need help very badly .is there anyway to get to the bios .

can u please tell how to short g2101 for clearing cmos

Hi @khurrammalik,

Scroll down to the Sept 14 comment by Michaelangelo in the answer below.

Hi Acer community,

I've just bought an Acer ES1-432, and want to install Windows 7 on it. However, whenever I try to boot from a disk or a USB that I made bootable through Rufus, it hangs on the Windows startup screen.

I've found this thread: http://www.tomshardware.com/answers/id-1952189/windows-install-disc-freezes-starting-windows.html that recommends settings a 'Launch CSM' option. However, after having updated the BIOS to the newest version (found here: https://www.acer.com/ac/en/US/content/support-product/6976), it still only has an option to disable Secure Boot, which I have always kept on 'Disabled'.

What can I do here? I think I need to get a BIOS with an option to change 'Launch CSM' or something that I can set the boot to 'Legacy', because all I can do is disable and enable Secure Boot. It does boot from the disk/usb, but it doesn't go past the 'Starting Windows' screen. All I need to do is install Windows 7, but it hangs.

Acer Windows 7 Laptop Computers

Please help!

Thanks in advance!

Acer Windows 7 Laptop

Edit: I have done everything in this video (and I also updated the BIOS) up to the point where I select to boot on the USB, and it hangs. https://www.youtube.com/watch?v=GmVhjkFMDNs Should I get that thing he has on his USB to run a custom boot?