Free Operating System
Freedom of using PC and internet without installed version of Operating System is something you would want sometime specially in case when you forget your Windows Login Screen password or Operating System Crash. Some operating systems do not need to be installed to run but there are some OS which are even independent of hard disk drive. You don’t need a hard disk drive at all to run operating system, use the internet and all the internet apps. Following are 4 very popular and effective portable Operating Systems to use PC without anything to be installed.