Virtual box with Extension 4.3.6

Its a best software for learning about windows installation. With the help of Virtual box you can use many virtual windows on a same pc on a same time. And you can easily do your practice for networking or many other things. And you can use mac operating system on windows and also you can use ubuntu and all others operating systems with help of Virtual box. And when you get Virtual box form other sites, and than if you want to connect your usb drive in your virtual window, than its cannot connect. Because its need an Extension for this. so i also include Virtual box Extension for users.

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