I downloaded Universal-USB-Installer-188.8.131.52 and Ubuntu Desktop 12.10 yesterday. I used a blank 4GB pendrive and burned the Ubuntu Desktop 12.10 ISO file on it using the Universal-USB-Installer.
I have a Windows 7 Professional OS running on 3GB RAM (Intel Core 2 Duo processor). I have sufficient hard disk space on my c drive (around 70-80GB free).
So I thought that I should be able to install Ubuntu easily.
I went to my BIOS settings and changed the boot order and put the USB option at the top. And then I rebooted my machine. I get into the installer. I even get to the screen where you get to decide to install Ubuntu within your windows. But as soon as I click continue on that screen, my machine reboots. And I cannot understand why this should happen.
I tried using a Ubuntu Desktop 12.04.01 ISO file instead. I got the same results.