How to configure the bios to UEFI?

I went down to windows 7 and I decided to revisit windows 8.1 but I noticed the startup was different on the failure to boot, I bought my laptop! He has been on UEFI now his Bios Legacy on! I tried to change it in the UEFI, I got this Message "Not found operating system"?

It is true, as you have installed Windows with active Legacy and can now start only on the traditional way.

to use UEFI, you must install Windows 8 with active UEFI.

Tags: Acer Laptops

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