cygWinux
Learn Linux the easy way without the Linux kernel using the Windows OS
...When a USB flash drive, portable hard drive, or other mobile device is installed or your cloud drive is synced, you have access to your software and personal data just as you do on your own PC. And when you unplug the device, no personal data is left behind.
No Special Hardware - Use USB flash drives, portable hard drives, etc.
No Extra Software - Just download, run the installer that can be brought cygwinikport and go
Hard to believe - It's that easy