FixMeStick boot loader and operating system kernel are based on Ubuntu 13.04 which are signed with the VerisignMicrosoft key. It will boot on PCs that ship with Windows 8 without requiring the user to fiddle with UEFI and Secure Boot settings. There’s a 32 bit operating system on the stick so it will work with 32 bit microprocessors and 64 bit processors. The user doesn’t have to know if their processor is 32 or 64 bit, the stick figures it out and loads the right operating system.
Source: https://thehackernews.com/2013/06/free-antivirus-2014-FixMeStick-windows8.html