Yes, I very recently had to disable restricted boot on a new low end Acer
Aspire 1 (32gig memory, small processor & very basic construction).
I too had to set up a supervisor password to change the security settings so
the USB would boot. Its not enough to just get the USB to boot, you have to
go into the security panel to disable secure boot which requires setting up a
password.
For the Acer Aspire 1 was just a matter of presing down F2 & then switching
it on, which took me into the place I needed to go.
USB was pendrive linux & I tried Etcher, both worked.
