Wubi was Marmite back in the day. With Linux being pitched as an alternative to Windows, people weren’t particularly impressed with using Microsoft technology to boot up a virtual Linux installation. Alongside the genuine concern that a power outage would obliterate your Linux setup, Wubi faced a lot of criticism. Wubi installed a full desktop Ubuntu installation inside a virtual hard drive on your Windows machine. Yep, you could literally install Ubuntu like a regular application, and boot into a full Ubuntu OS instead of Windows.