Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

When installing Ubuntu does it erase the other O.S.?

share|improve this question
For detailed info on installing, once you have made your decision, refer to – hexafraction Jul 5 '12 at 16:34

Not if you don't want it to. Boot in to live CD when ask click "Install Ubuntu" then "install side by side with Windows." Set HDD sizes for both OSes, and install.

When you boot you will see a boot loader called grub with about 5 options. One is Ubuntu; one is Windows; the rest are verious safe modes for Ubuntu. Choose your os and off you go.

Or mount a live CD in Windows and click Wubi to create Ubuntu as a windows program if you just want to try it out.

share|improve this answer

it depends on how you install Ubuntu. You can install it side by side (which is a dual setup) or overwrite the other OS or if you are using Windows even install through Windows with WUBI without nearly changing anything to the OS at all. If you use a live CD to install Ubuntu, it lists you the available options on how to install Ubuntu (including not erasing the preinstalled OS). If you are just curious and want to test Ubuntu safely, I'd advise you using WUBI to install it as a Windows application or to run the live CD without installing Ubuntu.

share|improve this answer

When installing Ubuntu from a Live CD, or USB, you have the option of partitioning the operating system, you also have the option of wiping the operating system and replacing it if preferred.

share|improve this answer

It depends on the option, you selected during installation. There are (most of the time) three options in the installation phase. "Install Ubuntu side by side", "Erase previous OS and install Ubuntu", and "Manual Partitioning". If you select "Install Ubuntu side by side" option, it will not erase the old OS.

If you select, "Install Ubuntu side by side" option, Don't confuse with the slider. The Ubuntu partition is the right one. So, make size accordingly. You might see this answer to see the partitioning side.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.