Step 1) Download an .ISO version of your installation (available through various sources [Microsoft, Apple, etc., or just from within the tool itself.]) Step 2) Plug in your USB and open up " My Computer ". Right click the USB, and select the " Format " button. Note Recommended options: FAT32, quick format. Now, continue at the warning prompt. And then press 'Ok' Step 3) Once the format is complete, open up this tool called ' YUMI ' YUMI - Multiboot USB Creator (Windows) | USB Pen Drive Linux Step 4) Using ' YUMI ', select the drive letter of your USB Tip Make sure you chose the correct USB by opening up 'My Computer' and reading the Drive Letter) Step 5) There is a large list of possible operating systems, along with a built in DOWNLOAD feature! Select the operating system you want to download, and then browse for your .ISO file. Step 6) Press "Create" ...