i Can't install Grub (during instalation ubunte studio on laPTOP lENOVO fLEX 10)

[Valery Loza]

Installation going to finish, bat don't write GRUB, either near Windows8, and only single insjtall on all disk

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.2
ProcVersionSignature: Ubuntu 4.4.0-31.50-lowlatency 4.4.13
Uname: Linux 4.4.0-31-lowlatency x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CasperVersion: 1.376
Date: Mon Mar 27 17:33:44 2017
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntustudio.seed boot=casper only-ubiquity quiet splash oem-config/enable=true ---
LiveMediaBuild: Ubuntu-Studio 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcEnviron:
 LANGUAGE=ru_RU.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)