requesting help-unknown password-lmde mate cin liveusb

[mintygreen]

first the info-
attempting to install linux debian 32-bit mate/cinnamon
on an old HP laptop
using pendrive linux live usb
(over maya which doesnt work well with the monitor)

So- the liveusb boots great and runs like a dream BUT, when I click "install" i get a password prompt. The password does not exist. sudo prompts for pass too. Password is not "root" "mint" or just blank. It does not exist. The research I have done says it may be a problem with pendrive linux usb. Perhaps some kind of odd persistent root password? In any case, Unetbootin is not working for me (won't load syslinux past 33%) and I have had no luck booting from dvd-as in it won't boot from dvd. I am in a pickle. Help?

[zerozero]

if none of those options are working you can try dd
if the iso is your downloads folder, open a terminal in that folder, so that your prompt looks like

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zerozero@deb-kde ~/Downloads $ 

then identify the usb with

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sudo fdisk -l

and replace sdX bellow with the exact "name" of the usb

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sudo dd if=<full name of the iso> of=/dev/sdX bs=1M