The output of lshw looks good to me. There is intel graphics, which should work with Ubuntu. There is one questionmark for the wifi chip, but usually Intel wifi works with Ubuntu.

You wrote that you have tried to boot from Unetbootin and Startup Disc Creator.

1. Did you try the dd method described by ohnonot? And you are sure that the image was written to the USB drive?

Code:
 sudo dd if=/path/to/your/ubuntu.iso of=/dev/sdX
In that case, did you really get the same result as with Unetbootin?

2. Then I suspect that the downloaded image is bad. Please check again the whole iso file with md5sum, that it matches what is posted in https://help.ubuntu.com/community/UbuntuHashes

3. If the md5sum matches, I suggest that you try another sub-version alias point-release of Ubuntu 12.04. You tried the newest one 12.04.2, so try either of 12.04, 12.04.1, I would suggest 12.04.1, which is more debugged and polished than the original one.

4. I suggest that you download and use my script to make imaging with dd safer. See Howto make USB boot drives. This method has a high success rate, partly because it does not depend on previous formatting of the USB drive.