Only as a chroot.
When you first install Ubuntu, it will walk you through the steps to install it and keep your other OS installed. Then when you boot your dual-boot system, you can simply select Ubuntu.
Wubi can only be used to install Ubuntu. (It stands for Windows-based Ubuntu Installer).
You can update Ubuntu later as well without any issues. ... If there are other operating systems installed, you may get the option to install Ubuntu along with them in dual boot. But since your goal is to only have Ubuntu Linux on your entire system, you should go for Erase disk and install Ubuntu option. Read More:- hands-on.cloud
Ubuntu is an operating system, so just tell the installer to use the entire disk. However, an operating system is useless without software, and Ubuntu includes many software packages on a clean install.
A quick and relatively easy method of getting Ubuntu Linux - if you already have a Windows system and you want to run Ubuntu Linux on it - is to download Ubuntu and install it by using the Wubi (the Windows-based Ubuntu Installer) from this Ubuntu web site: http://wubi-installer.org You can use the Wubi (Windows-based Ubuntu Installer) to download and install Ubuntu Linux in Windows and this is very similar to installing any software program in Windows. One of the great benefits of using the "Wubi Installer" is that you can also uninstall Ubuntu Linux from Windows if you need to (in the same way as you uninstall any Windows program). When you use the "Wubi Installer", you DON'T have to do the following steps (that you would "typically" need to do) to install the Desktop version of Ubuntu Linux on an existing Windows system: download a Linux ISO file burn the Linux ISO file to a Linux CD set up your computer to boot from CD boot with the Linux CD to run Linux "Live" and get to the GNOME desktop double-click on the "Install" icon to start the installation routine run the Ubuntu Linux installation routine Ubuntu Linux Training Tips: The Wubi Installer is only used to install the Desktop (not Server) Edition of Ubuntu Linux on an existing Windows system - and not on a new or used computer system that doesn't have Windows already installed on it. All of the "download, burn, setup, and so on" steps listed above will be described shortly in upcoming sections. The Ubuntu Linux installation steps described above are required to install the Desktop and Server Editions (versions) of Ubuntu Linux - either on a computer system that has Windows (to create a Dual-Boot Windows / Linux system) or one that doesn't have Windows Ubuntu Linux Training Tips: Keep in mind that prior to installing Ubuntu Linux (or any Linux distro) on an existing Windows system, you need to do a complete backup of your Windows system - twice! Also make sure that you can use the backups that you have created to restore your Windows system from backup. (copied from "http://www.ubuntulinuxbookblog.com/wubi-installer-windows-based-ubuntu-installer-training-download-install-ubuntu-linux-in-windows.html" ) A quick and relatively easy method of getting Ubuntu Linux - if you already have a Windows system and you want to run Ubuntu Linux on it - is to download Ubuntu and install it by using the Wubi (the Windows-based Ubuntu Installer) from this Ubuntu web site: http://wubi-installer.org You can use the Wubi (Windows-based Ubuntu Installer) to download and install Ubuntu Linux in Windows and this is very similar to installing any software program in Windows. One of the great benefits of using the "Wubi Installer" is that you can also uninstall Ubuntu Linux from Windows if you need to (in the same way as you uninstall any Windows program). When you use the "Wubi Installer", you DON'T have to do the following steps (that you would "typically" need to do) to install the Desktop version of Ubuntu Linux on an existing Windows system: download a Linux ISO file burn the Linux ISO file to a Linux CD set up your computer to boot from CD boot with the Linux CD to run Linux "Live" and get to the GNOME desktop double-click on the "Install" icon to start the installation routine run the Ubuntu Linux installation routine Ubuntu Linux Training Tips: The Wubi Installer is only used to install the Desktop (not Server) Edition of Ubuntu Linux on an existing Windows system - and not on a new or used computer system that doesn't have Windows already installed on it. All of the "download, burn, setup, and so on" steps listed above will be described shortly in upcoming sections. The Ubuntu Linux installation steps described above are required to install the Desktop and Server Editions (versions) of Ubuntu Linux - either on a computer system that has Windows (to create a Dual-Boot Windows / Linux system) or one that doesn't have Windows Ubuntu Linux Training Tips: Keep in mind that prior to installing Ubuntu Linux (or any Linux distro) on an existing Windows system, you need to do a complete backup of your Windows system - twice! Also make sure that you can use the backups that you have created to restore your Windows system from backup. (copied from "http://www.ubuntulinuxbookblog.com/wubi-installer-windows-based-ubuntu-installer-training-download-install-ubuntu-linux-in-windows.html" )
sudo apt-get install squid
You can't. You aren't running Ubuntu directly on the hardware, but in a virtual machine. The virtual machine requires you to boot into Windows before you can start it. I am not aware of any options for Windows that would let you boot and start only a single application separately from another boot entry.
This is generally a matter of preference based on what user interface you prefer (KDE in Kubuntu, or GNOME in Ubuntu). They are both produced by the same company, although some believe the Ubuntu distribution receives more attention and polish.
The only way you can install an operating system without a BootableUSB drive or disc like Ubuntu, is to install and run a virtual machine program. VMware has a good free one just for this. It will run on top of your primary operating system. To elaborate, its like havinganother computer run inside your computer.
Generally, Linux is considered very secure from viruses. If you exercise general safety behavior, it is unlikely that any virus will enter your system. Even if a virus does get through into the Virtual Machine, it will only affect your Ubuntu install, not Windows.
Download the latest Ubuntu and burn the file as an iso. Change the boot order to make the CD drive first boot, rather than the hard-drive. With the iso disk in the CD drive, reboot the computer. Follow the instructions as they appear on the screen as Ubuntu is installed from the CD disk on to the computer's hard-drive. Once the install has finished, reboot the computer (after removing the ISO disc). Note: during the install procedure, you will be asked whether you want to add Ubuntu alongside the present operating system, or should Ubuntu use all the hard-drive, so wiping the original OS. If the latter is your choice, Ubuntu will become the only OS on the computer, so be sure to backup (remove to a safe place) any important files before starting the install.