For testing and playing around with Linux Distros, VirtualBox allows you to 'install' them under Windows (you need a newer PC for this... at least 8g ram, 4 core processor to function halfway decently because you'll assign the amount of ram and number of cores to use during each image install) directly from the downloaded image without creating a USB drive. VB has its limits, but you can dink around with the various OS's, and delete 'em whenever you want. You can have as many different ones installed as you have the disk space to accommodate.