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I want to install Ubuntu on my laptop , that doesn't have a CD-ROM drive , and I have no spare USB disk spare. I've tried Wubi , but that doesn't seem to work (since it prompts me to have the CD in the drive, wich I dont have.)

How can I install Ubuntu , easily and in a fast way?

P.s: I want it to dual boot it with Windows 7 (which was preinstalled).


  1. When extracting the ISO to a folder, and run Wubi, it does install, but when I reboot the computer, it doesn't show GRUB , nor I can choose if I want to boot Ubuntu or Windows 7.

  2. After trying for the third time today , wubi gives me an error:

An error occurred:

Permission denied.

I'm the administrator on the pc.

How come?

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Ubuntu installation guides: – user26687 Jun 17 '14 at 8:07
If you have a spare system, netbooting might be an option. – muru Jun 17 '14 at 8:10
This is not really a spare system , lol. This is my school laptop , wich had ubuntu before windows 7. – user294273 Jun 17 '14 at 8:12
show me the screenshots installation with wubi – A J Jun 17 '14 at 8:21
If you have a floppy drive: – NewWorld Jun 18 '14 at 8:21

6 Answers 6

up vote 32 down vote accepted

To install Ubuntu without CD/DVD or USB pendrive, follow these steps:

  1. Download Unetbootin from here.

  2. Run Unetbootin.

  3. Now, from the drop-down menu under Type: select Hard Disk.

    Hard Disk

  4. Next select the Diskimage. Browse to the directory where you downloaded the iso file of Ubuntu.


  5. Press OK.

  6. Next when you reboot, you will get a menu like this:


  7. Select Unetbootin and you will get the "Try" or "Install" option there.

  8. Finally, you can install your version of Ubuntu alongside Windows.

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Thanks so much , this worked! – user294273 Jun 17 '14 at 11:13
Glad it helped :-) – Raphael Jun 17 '14 at 11:23
Tried this on Windows 8.1. Got the boot manager entry for Unetbootin but after selecting it, I get an error stating that Windows (?) cannot find required files. Booting Windows selecting the Windows 8.1 boot manager entry still works. – Alexander Zeitler Nov 24 '14 at 23:41
Hey @AlexanderZeitler did you find a good solution for Win 8.1? :) – twigmac Dec 20 '14 at 9:12
Any idea why it doesn't show any other drive than "C:\"? – a-Jays Jul 20 at 10:10

Instead of using WUBI, you can create an additional partition, or use an additional hard drive to write the liveCD image to, using unetbootin. Then you boot from this partition and continue the same way you would as if you'd be booting from a USB or CD.

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And how can i make an additional partition and use unetbootin to install ubuntu? – user294273 Jun 17 '14 at 8:05
To answer your question of the additional partition, you can either use your disk management in Windows or use gparted. Beware though, resizing partitions always have severe risks of losing all data. Take your backups before you proceed! – Jakke Jun 17 '14 at 8:35

I would suggest you to install Ubuntu in Virtual machine like VMPLAYER instead of dual booting. This helps to keep your boot process less messy and Ubuntu being fast works well in vmplayer.

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Even though this is a good solution to run both OS'es, you could also argue that you can install Ubuntu and run Windows in a VM. I usually suggest though that people dual-boot. It gives people a few more abilities from running in a VM and when people get tired of Windows, they can just clean up the partition and add it to their Ubuntu installation. When you're using virtual machines, you have to start from scratch again. Virtual Machines are a good way to test things, run web servers etc, but they're lacking in some areas. Especially if you're talking about a desktop system. – Jakke Jun 17 '14 at 22:33
You make good points there @Jakke, but don't forget one advantage of using a VM is that you're able to run both OS'es simultaneously, which could be a big advantage for some users. – Richard Fawcett Jun 18 '14 at 8:26

You can try using EasyBCD to add the ISO to the Windows Boot Manager. In some cases it may not work, but give it a try.

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I dont see an option to add the ISO to WBM, where can i find it? – user294273 Jun 17 '14 at 8:12

Create a VM that uses a physical disk, then boot the VM with the iso.

I'd recommend using VMWare for this, as I've found Virtualbox harder to configure.

I'd recommend using a complete disk for this. Using only a partition is possible in theory but I've never done it.


1) Delete all the partitions where you'll install linux. On Windows 7 / 8 do it from "Computer Management". (some partitions are protected, and windows won't allow VMWare to access the disk if they're not removed first).

2) Open VMWare as Administrator (secondary click, run as Admin). Create a new VM, choose custom mode, when creating the HD choose create from physical disk.

3) Boot the VM from the ISO. If you only see a white cursor and a black screen you're booting from the empty HD.

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You can use UNetbootin to install Ubuntu 15.04 from Windows 7 into a dual boot system without the use of a cd/dvd or a USB drive. I am writing this from a fresh Ubuntu 15.04 install using the method below.

Step 1: Backup all your files...just in case

Step 2: Defrag your C:\ drive [right click C drive>click on Tools Tab>Defrag]

Step 3: Check for errors [right click C drive>click on Tools Tab>Error Checking] reboot and wait for the app to finish completely, the system will reboot when finished

Step 4: Create Unallocated Unformatted free space on the C drive [Control Panel> Administrative Tools>Computer Management>Disk Manager>right click the C drive>Shrink Volume] I believe the suggested space for a full Ubuntu install is 16 Gig, I made 41,000 MB about 40 Gig. Just type the size into the already selected box. The wording MS uses is confusing be assured typing 41000 will make 40Gig free space. click next if it asks to format DON'T Also Do Not assign a letter to the newly made volume.

Step 5: Reboot Windows 7 a couple times to be sure the changes in the volume have taken without errors

Step 6: Download the Ubuntu 15.04 ISO

Step 7: Run UNetbootin [choose disk image radio button and select the Ubuntu ISO image you downloaded. Make sure that Type: Hard Disk is selected in the drop down. Make sure Drive: C:\ drive is selected in the drop down. Click OK] The program will run through 4 steps and then ask to reboot now...Comply

Step 8: During reboot you will have a choice between Windows and UNetbootin, [Choose UNetbootin] This will boot a Live CD try before you install desktop.

Step 9: After you look around a bit you will notice an Install Ubuntu 15.04 shortcut on the desktop [start the install, I think the 4th step of the install shows the main volume with Windows and the free space you created using Disk Manager. [Make sure you click the free space and set it for "/", click continue install] Takes a few minutes then it will reboot automatically. If you don't press any keys it will default to the Ubuntu OS. Let it boot. setup your WiFi look around a bit then reboot when you are ready. Upon reboot arrow to Windows and it will boot Windows 7 boot loader where you will see the UNetbootin is still a choice. Windows will be the default there and allow to boot.

As I stated before I am typing this from Chromium running on Ubuntu 15.04. I wrote all this so you wouldn't be worried about using other partition software such as Gparted or Parted Magic. No need to purchase anything Windows already has a good tool> Disk Manager

I'll be honest I still need to figure how to uninstall the UNetbootin loader from the Windows boot loader but that is a small issue, I just "Frugal Installed" Ubuntu successfully. :)

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