First of all sorry for.my bad English ...
So here is my problem.
I've made a bootable USB. It's working perfectly on all computers friends (even laptops) But not on mine ....
I've a laptop: Acer aspire 7720 - 64bit (released in 2008)
I'm able to boot on other USB but not on Recalbox .... (I've tried the x64 and x86 version)
When booting on my laptop I've the message telling me that "it's missing an operating system"
I've burned with Etcher and also tried with Rufus and Win32DiskImage
My computer have Not secure boot
Who can help me ?
Thanks an cheers from Bolivia
Any ideas ?
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You're not telling much ... I guess your laptop has UEFI enabled. Try to boot in legacy BIOS moden, or disable UEFI security