Installed Ubuntu 16.04 on my Windows 10 updated Lenovo Laptop in UEFI mode(would not work in legacy). I got a message during install that if continued with UEFI mode install one or all OS's bootloader might not work. Well sure enough ubuntu install is complete and no boot loader is coming up. Been doing some reading but not real sure where to go from here. Tempted to scrap windows and format drive and install Ubuntu only. I see both partitions not sure if windows has been compromised or not. Currently only able to boot into LiveUSB and have tried to repair grub with no success.
Disk /dev/sda: 298.1 GiB, 320072933376 bytes, 625142448 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: dos Disk identifier: 0x39063905 Device Boot Start End Sectors Size Id Type /dev/sda1 * 2048 1026047 1024000 500M 7 HPFS/NTFS/exFAT /dev/sda2 1026048 415424511 414398464 197.6G 7 HPFS/NTFS/exFAT /dev/sda3 415424512 419424255 3999744 1.9G 82 Linux swap / Solaris /dev/sda4 419424256 625141052 205716797 98.1G 83 Linux Disk /dev/sdb: 1.9 GiB, 1992294400 bytes, 3891200 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 236ADC0B-976D-4DC2-83C8-51953D78FEF8 Device Start End Sectors Size Type /dev/sdb1 2048 3891166 3889119 1.9G Microsoft basic data