Dude, i can’t install by usb stick. I follow this https://support.endlessm.com/hc/en-us/articles/210654503-How-do-I-create-an-Endless-USB-stick-from-Linux instruction, but onlu show grub text 
Is this a computer that came with Endless OS originally?
No, basically i use ubuntu.
Dude, no answer ???
Sorry, didn’t see the email notification. Can you verify the integrity of the image you downloaded, and try re-installing it on the USB? I’m assuming this is a live-boot from the USB and not a post-installation boot