when installer said finished copy files. then the crash message appeared

I am using a core 2 duo 3GHZ cpu 8 GB ram 64 bit installer.
in the 2 times I have tried the error is different.
1) error writing to HDD (hdd then test no error found)
2) go to end of copying files. ( have been using this machines previously with Windows 10, For this installation I choose to let Linux use the WHOLE HDD

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: ubiquity 2.21.37
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.365
Date: Fri May 27 11:38:25 2016
InstallCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper iso-scan/filename=/UltimateDesktop/ubuntu-15.10-desktop-amd64.iso lxfdisc=LXFDVD210 lxfpersistentfile=UltimateDesktop/casper-rw.sqfs apparmor=0 nomodeset quiet splash desktop=ubuntu ---
LiveMediaBuild: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcEnviron:
 LANGUAGE=en_AU.UTF-8
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)