Bootable USB not Creating

My computer was bought in Germany, with Windows 8.1 already pre-installed. I had to restore factory settings and as such the change to English language has broken and Microsoft want to charge me 50USD to change my computers language to English.

I want to install Ubuntu, however, 2 issues: 1. my computer is in German 2. Steps shown aren't clear to creating the bootable USB

1. I have USB and have downloaded the Ubuntu software and then run to install onto USB
2. It restarted my computer, did as such then went tot he Linux pendrive USB installer tool; opened this up. Now only ONCE has it worked that when I select the first drop down "Ubuntu" and to browse, its found the.iso file. I selected this andput it onto my USB drive.
3. Restarted PC came up with error (in German!) with 3 options. It then went to select windows 8.1 and Ubuntu, when selecting Ubuntu it came up with the same german error (3 things were listed, no idea what it said)

A note; I then retried doing this several times and now when I try to use the USB installer tool, there is no way to locate the .iso file. Miscrosoft did send me a cmd step by step to try and fix my issue, however, it doesn't work, cause they've provided English version and it doesn't match off to the german version.

I am about to throw this computer on the floor because I cannot use anything other than the internet, as everything is in German!. When I've used the usb installer I've found the .iso file on my explorer, but doesn't display in the usb installer - instructions are pretty useless, like it automatically does it and doesn't explain how to get from a to b.

I am so frustrated, I'm travelling in non-English speaking country that isn't Germany....does anyone know what I can do?