Errno 5 during installation

Hi all,

First of all, sorry if this question is not in the right place. I am very beginner with VM.

I have to install a VM on my computer and some colleagues advised me to install the Hypervisor. So, I downloaded it and put an ISO on a USB key. I would like to install it on another USB key but after the reboot and all the menu, so during the installation, an error "errno 5" appears...

I've seen that it could be a problem of Hash. But, how can I check if it's correct or not?

Thanks,