After 7 months friendly, Windows damage the GRUB. Every time I installe Ubuntu, it works till the moment I open Windows. The "quick start" of Windows is not active now. (Aparently this "fast start" was a problem.)
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubiquity 16.10.14 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CasperVersion: 1.379
Date: Sun Mar 12 22:23:38 2017
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
ProcEnviron:
LANGUAGE=es_ES.UTF-8
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=es_ES.UTF-8
LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)
It looks like your existing filesystem is damaged. Try having the installer format the partition, or if you don't want to do that, use e2fsck to check and repair it.