Sony Vaio UEFI does not boot

[Tzovkata]

Good morning,

 

I have tried to upgrade my windows 8 to 10, after I changed the UEFI mode to boot from external devices it stopped working. Now I can't even get back to Uefi settings to change them to default, as laptop says "No operating system found". Can you please help?

[sfbp]

Sorry, no. This is not an official Sony site, and we don't know very much about the specifics of Vaio computers.

You have to get into the ROM BIOS configuration, which you can do with a key sequence. If you get to the "missing operating system" message, hit Ctrl-Alt-Del and try again.

The key in decreasing order of likelihood is either <DEL> or <F2> or <F9>.

Good luck!