VirtualBox is a free software for creating and running virtual operating system installations called virtual machines. VirtualBox was originally created by German software company innotek, now developed by Sun Microsystems as part of its Sun xVM virtualization platform.VirtualBox Supported host operating systems include Linux, Mac OS X, OS/2 Warp, Windows XP or Vista, and Solaris, while supported guest operating systems include DragonFlyBSD, FreeBSD, Linux, OpenBSD, OS/2 Warp, Windows and Solaris.As you know Windows 7 beta is released and everyone is exited about the upcoming release. Since the Windows 7 is in beta form so it is not a good idea to wipe out your existing installation for experiencing the features of Windows 7. In this tutorial we’ll show you how to install Windows 7 inside Windows XP or VISTA or Linux with the help of VirtualBox.

1. Fire the Virtualbox and click on Newbutton located at top left hand corner.

2. Now you will be in new Virtual Machine Wizard, Click Next.

3. Name the Installation like Windows 7 etc. In Operating System Pane select Microsoft Windows and in Version pane select Windows 7.

4. Allocate the Random Access Memory { RAM } to virtual machine, 1GB is recommended. Every time a virtual machine is started, VirtualBox will allocate this much memory from your host machine and present it to the guest operating system, which will report this size as the (virtual) computer’s installed RAM.

5. specify a virtual hard disk for your VM. If you have previously created any virtual hard disks which have not been attached to other virtual machines, you can select those from the dropdown list in the wizard window.Otherwise create a new Virtual HDD by Click on New >> Next >> Fixed Size Storage >> Specify the Size and Location.

A dynamically expanding file will only grow in size when the guest actually stores data on its virtual hard disk. It will therefore initially be small on the host hard drive and only later grow to the size specified as it is filled with data. A fixed-size file will immediately occupy the file specified, even if only a fraction of the virtual hard disk space is actually in use. While occupying much more space, a fixed-size file incurs less overhead and is therefore slightly faster than a dynamically expanding file.

6. Now you have a virtual Machine with Virtual Ram, Virtual HDD and Virtual Lan now Installa Virtual Operating System. Insert your DVD of Windows 7 in your Physical drive or mount the ISO image into virtual drive and note the letter of drive. Fire the Start button.

Click Next.

7. In Media type select CD / DVD-ROM Device and in media source pane select the drive letter or mount the image directly in Image File option.

8. That’s it sit back, releax and enjoy the taste of Windows 7.

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