Windows 8.1...from CSM to UEFI, is it possible?

spennacchione

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Aug 26, 2015
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Hi guys.
Yesterday i upgraded my Toshiba Satellite L50 with a SSD.
I installed windows 8.1 and all seems to be ok...except a little thing....
When i booted the usb for install windows 8.1 my bios was setted in CSM (because i read that if i was in UEFI the usb wouldn't booted) and now if i try to switch it to UEFI the pc can't find the ssd and says something like "Reboot and select proper device".
(I have already tried with secure boot eneabled a and disabled both but is the same)

At the moment i'm in CSM mode With the AHCI enabled...What can i do for switch to uefi?
Thanks in advance.