Cannot install ubuntu after trying to fix bootloader

Description: Ubuntu 16.04.1 LTS
Release: 16.04

3.20.1+git20160617.1.0440874.ubuntu-xenial-0ubuntu1~16.04.1

What I am trying: Installing Ubuntu after a trying to fix of Bootloader after prev OS(Windows 10)

* Could not complete installer

* Installing from CD

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.2
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CasperVersion: 1.376
Date: Wed Aug 24 10:18:45 2016
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)