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I have tried so many times now but it doesn't work! I have an Acer Aspire V with Windows 8.1 64-bit, 2.50 GHz AMD Quad-Core Processor A10-5757M, 512MB AMD Radeon HD 8650G Graphics System Memory, 8GB DDR3 Memory and 1TB (1000GB) HDD. I tried to install with USB because I don't have a DVD-Drive. I used Universal-USB-Installer, selected Ubuntu 64-bit, browsed and found unbuntu-14.04-desktop-amd64.iso and selected it. I also selected the USB-Drive I will install it on and clicked Create. Then it installed Ubuntu on the USB. I restarted the computer with the USB-Stick plugged in. Then the Acer title screen started to blink. I tried to tap the F12 button but it either not worked! Please help! What do i need to do?