I downloaded Ubuntu 12.10 from Ubuntu site. It has been downloaded perfectly fine. I now want to install that in my hard disk directly and not in virtual machine.
How can I do that? Shall I copy the .iso file in CD and put the CD in the drive and start my laptop. Will it work?

In order to install the full os you will need to burn the .iso file to disc and restart the pc making sure the BIOS boots from the disk drive 1st in order to get it working.

Burn the file as an image & not data.

The simplest way is to do as suggested, burn the iso as an image to a CD/DVD.
It is possible to boot the iso directly from a system which has Grub2 installed but this will not work with all Linux distributions. You don't indicate which operating system you are using?

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yancek, I am using Windows 7. Please have a look at the screenshot. I have downloaded from Ubuntu site: ubuntu 12.10 OS.
So, as per your post, please let me know whether it is possible to boot ubuntu 12.10 directly on my machine. when you say that directly i can boot, do you mean that i can install the Ubuntu on my machine hard disk that is seperately allocated for Ubuntu.( i don't know what that grub2 is!)

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grub4dos can boot iso's.

Dman58 and yancek, I am unable to burn the ISO file. I am sending you screenshots of the same (file named burn1 and burn2) when I am trying to burn via Nero.
Please see and update me where I am wrong.
Also , when it error-ed out while burning it generated a log file. YOu can have look at that also to see what went wrong.
Also, nowhere it asked me for any option whether i want to burn as image or data as Dman58 had mentioned in his post.

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Log.txt (24.9 KB, 19 views)

I am not a MS user so I can't be much help on the burn problem but when you burn an image you want to use as slow a speed as possible to get as good an image burn as possible.

If, however, you have Ubuntu in VM on your W7 install why not just boot to it and do the burn with Ubuntu? Should have Brasero installed, I think, and it would probably work fine. I prefer xfburn for most things but any Linux burner should work fine.

Have you tried right-clicking on the Ubuntu iso file and selecting Open with 'Nero'?
Grub2 is a bootloader used with most current Linux operating systems. Since you only have windows 7, that won't help you. I don't use windows so I don't know if there is a way you can boot an iso file with it. You could try the windows version of unetbootin, download it and put the Ubuntu iso on a flash drive:

http://unetbootin.sourceforge.net/

yancek, thanks for the useful link.

yancek , I followed the steps in the link mentioned that you provided.
The 4th point in the link was done successfully :"Installation complete, Reboot"
Now when I rebooted, it worked fine and I selected UNetbootin.
Then I entered Ubuntu and saw screen with many menu. I then clicked "Install Ubuntu" but nothing happened. I tried 2 more times by rebooting but nothing happened and once an error message also came that"an error occured". i don't know how it came.
Do I need to install any plugin also , I haven't done so because your main page of link didn't mention that.
I took screenshot while running Ubuntu to show how I proceeded but where it saved I couldn't find after logging back to Windows.

Please guide me further.
Hope to hear from you soon.

After downloading the windows version of unetbootin, selecting the iso which you had on your hard drive, selecting your flash drive and letting the unetbootin program install to the flash you rebooted. You set your BIOS to boot from the usb, saw the boot menu for Ubuntu and selected Install. I would suggest that you select Try without installing and see if you get the Desktop. There should be an Install icon there.

Try it again, boot to the Desktop. If you see an error, write it down to post it.
No, you don't need any plugins. I've used unetbootin numerous times without problems but I've always used the Linux version??
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I am trying now with what you told. Also, just wanted to bring in your notice that i doing "frugal install" that is on hard disk and not flash drive

I believe he was talking about your image on the usb stick when you get on there.

The first menu item is try Ubuntu. It just boots from the usb device and runs in your ram with no effect on your computer at all. That way you can try it out and be sure this is what you want on there.

You can install from that "Live Session" too.

I am having Fedora9 and Windows installed on my hard disk. Now, i boot my system. It asks me for one of the 2 options:
1)Fedora
2) Other
I click other. Then it asks me for the below 2 options:
1)Windows
2)Unetbootin
I click Unetbootin. Then I get menu. I select "Try Ubuntu" (and not "install Ubuntu"). Then i get the desktop. There I see the menu named "Install Ubuntu". i click it. it asks me for language. i give english(us). Then after 1-2 more steps a window comes having menu"install" (just before this it says something like this : it will be installed in hda/sda2). i click "install". Then after 4 minutes a message comes"sorry ubuntu 12.10 has experienced an internal error". then I see the log. The 1st few lines are as below:
> Executables path
/usr/lib/ubiquity/bin/ubiquity

> Packate
Ubiquity 2.12.16

> problem type
Crash

>Title
Ubiquity crashed with key Error in plugin_on_nead clicked ():'use_device'

>Trackback
--------
-------( much more below which I didn't note, i had to note manually everything)

So what you suggest??
I have verified with md5sum that the iso file is same as the original.