Re: BOOTMGR is missing
unetbootin messed something up. Or there is some previous mess involving the boot sector of the usb stick. My suggestion:
1. Format the stick again as FAT32, to make sure you get rid of everything.
2. Use unetbootin again to copy the UNR image to the stick. IGNORE the message to reboot after it finishes, just close unetbootin.
3. To get rid of the unetbootin menu, open the stick and do:
-in the root folder rename syslinux.cfg to syslinux.old
-in the folder isolinux find and rename isolinux.bin to syslinux.bin, isolinux.cfg to syslinux.cfg
-go back and rename the whole folder isolinux to syslinux
This procedure will make available the standard ubuntu menu which gives you options to Try Ubuntu, Install Ubuntu, etc. Otherwise, the problem with unetbootin is that it creates its own menu with one entry called 'default' which starts the install process right away, as if you selected Install Ubuntu. To my knowledge, you will not have option to Try Ubuntu if you don't do the above procedure.
Darko.
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Ubuntu 18.04 LTS 64bit
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