First off...

First off, I've already searched Ask Ubuntu and found multiple other questions[1] [2] [3] [4], but a) most of them don't fully fit my circumstances, and b) the ones that do haven't been answered fully, if at all. So don't mark this as a duplicate because it's not one.

Now, then...

The Question

I booted my computer to USB and it gave me the option to check the disk for defects. I did so, but it returned an error—on two separate occasions—saying "Errors found in 2 files".

The Details


  • Make & Model: Lenovo G50
  • Operating System: Windows 10 Home 64-Bit
  • Prospective Distro: Ubuntu 14.04.4 LTS Desktop 64-Bit
  • Flash Drive (1st Attempt): Silicon Power USB 3.0 16 GB
  • Flash Drive (2nd Attempt): SanDisk Cruzer Blade USB 2.0 8 GB

Thanks to 100 kb/s WiFi speeds, it takes 2–3 hours just to download the dang ISO file; so obviously I'm not gonna do it more than once unless I absolutely have to...


2 Answers 2


I had the same problem with Universal USB installer.

If checksums are correct, there must be a problem with the live usb creator.

After that I used Unetbootin (on Windows 7) and there weren't any errors anymore.


  • 1
    I'm reformatting my flash drive again; then I'll be trying UNetbootin, per your and @user4901968's suggestion. I'll re-comment once I do to update you all. Mar 19, 2016 at 22:05
  • UNetbootin worked for me. Universal USB Installer always wrote corrupt files. Jun 15, 2016 at 19:45
  • UNetbootin failed for me, trying to get Ubuntu 16.04 on a Lenovo P50
    – Erik
    Aug 31, 2017 at 20:01

In my case I also had this issue during Integrity check / Check for defectsErrors found in 2 files.

One of them was grub (https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1617721).

I didn't fix it, but workaround was to connect to the Internet and check Download updates during installation.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .