Errors while installing Ubuntu 15.04 on laptop/USB-drive

[Denis]

I started experiencing difficulties with booting Ubuntu/Ubuntu Gnome. Once I repaired boot, system became unstable, so I decided to reinstall it. After for about 7 hours of installation I understood, that it's no use. Booting became extremely slow. However, after a while booting returned to the loading speed like it was before.
So, I decided to completely format drives and install new Ubuntu. Unfortunately, it always ends up with an error. The message suggests my drive is old (which is true) or it has some issues. Well, I decided to install Ubuntu on flash drive - it ended with an error and wants me to choose another drive.

What is an actual problem? Broken distribution? Or is it a laptop/drive issue?

I'll provide you with information you need if it's necessary.

Yours faithfully,
Denis Kuznetsov

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.25
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic i686
ApportVersion: 2.17.2-0ubuntu1
Architecture: i386
CasperVersion: 1.360
Date: Mon Jul 13 21:24:28 2015
InstallCmdLine: initrd=/ubninit file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --- BOOT_IMAGE=/ubnkern
LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422)
ProcEnviron:
 LANGUAGE=uk_UA.UTF-8
 PATH=(custom, no user)
 LANG=uk_UA.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Reviewing your log files attached to this bug report it seems that there is a problem with your installation media (CD/DVD). You can verify the integrity of the Ubuntu ISO files you downloaded by following the instructions at https://help.ubuntu.com/community/HowToMD5SUM. You might also retry your installation with new media. In the event that is is not in fact an error with your installation media please set the bug's status back to New. Thanks and good luck!

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Launchpad Janitor (janitor)]

[Expired for ubiquity (Ubuntu) because there has been no activity for 60 days.]