I am just about done re-doing a used laptop for a friend, typical story, windows 10 misery. I won't do multi-boot with windows anymore for myself or anyone that wants me to re-do a computer, too much hassle.
So I had a lot of trouble with uefi on this laptop than on previous ones, none of my livecd's wanted to boot, the laptops bios does have legacy mode and tried enabling that first of all but still no luck, finally pulled a copy of pclinuxos 64 bit with mate desktop that is uefi-enabled (can only install if you have the fat32 partition for secure boot but will run as livecd without it), and it booted right up, don't know why the others wouldn't.
Anyhoo, man, windoze had like 7-8 partitions, some of which I couldn't even view (which is also new for me, hadn't had that happen before). But good old Gparted made short work of that mess, I usually run dban too just for good measure but I blew it off this time. So I re-partitioned from the livecd, and had no further problems.
My little minimalist iso works great, so light and fast, mate is a great desktop. But I might try to make a CLI-only one just to take it a step further and start with a completely clean slate.
Going to make a 64 bit version next, with whatever it takes with regard to uefi-settings to make sure the livecd can boot into the windows 10 machines.