Virtual Operating System uses are also called cloud computing. It is growing rapidly due to its portability. You can gain access to your file and work on it without anywhere around the world if you have internet connection over there without installing software. Most of this operating system come with all general software you use in your daily life. You can edit your MS Office document, can edit it and, save it there for future use. Can take a print, download it or simple delete it. There is no problem anywhere and is secure. The most secure is using there browser for your internet surf. They install browser history on their own server which keep you secure from anonymous malicious site. I found over 26 Virtual PC but listing here only those which I or some of my friend tested. All work almost same with different way or use different software for working with your file so I am leaving the description and simply providing the link.

1. GHOST
2. Gladinet
3. Glide
4. Cloudo
5. Startforce
6. Desktoptwo
7. Purefect Desktop
8. Schmedley
9. GNOME
10. EyeOS
11. MyWebDesktop

Hope you enjoy this list and use it for secure yourself on internet.