lubuntu usb installation alongside win7 home pro said it failed

[pat hoolahan]

burned iso of lubuntu current version to usb.
compaq presario cq57 with win 7 installed.
error happened and said installation will not run.
did allocate a drive from win 7 for lubuntu to reside.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: ubiquity 17.04.9
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic i686
ApportVersion: 2.20.4-0ubuntu4
Architecture: i386
CasperVersion: 1.380
Date: Fri Jul 7 02:54:34 2017
InstallCmdLine: file=/cdrom/preseed/lubuntu.seed boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash ---
LiveMediaBuild: Lubuntu 17.04 "Zesty Zapus" - Release i386 (20170412)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[pat hoolahan (reedyweb)]

just want to install lubuntu as main operating system but very afraid to remove win 7.
wanting to keep win 7 as a fail safe so i can boot to if lubuntu fails.

[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.]

[pat hoolahan (reedyweb)]

i've successfully installed lubuntu but i lost win 7.

[Launchpad Janitor (janitor)]

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