
Most of the people upgraded their operating system from Windows 7, 8 and 8.1 to Windows 10. Microsoft has released it's Windows 10 and many people upgraded their PCs and laptops. But what about the previous system where it is? It is saved in your computer itself. It is so because the system don't delete the previous operating systems till approx one month, it does so for you that if in any case you want to revert then you can do...