How to install Ubuntu on VirtualBox
is a world famous program that allows its users to run an operating system inside another OS without any interruption or incompatibility. Below you can find a detailed manual with plenty of screenshots on how to install Ubuntu on VirtualBox with your Windows 7.
The app enables to set up all kinds of early and modern operating systems without any interference from your current OS. Thus, you can also easily install Linux on VirtualBox (or any other operating system for your taste).
Now VirtualBox is ready to set up the amount of RAM for your VM. If you have about 1 GB of RAM, do not change the standard settings. In case you are lucky to have more than 1GB, you may use about a quarter for your VM. Still, if you have no idea on the amount of your memory, leave default settings and choose Next.
Then you will need to add Ubuntu disk image to the newly created empty hard drive.
After that double-check that the CD/DVD Device entry is Empty. That`s all!
Now you`ve successfully installed Linux on Virtual Box!