Complete Uninstall of Ubunto 11.04 and Installing Windows 7 from CD

[cheema0003]

Hi,
I have recently installed Ubuntu 11.04 and completely wiped out Windows 7 on my Sony Vaio laptop. Now when I boot the laptop, Ubuntu load up fine. But I want to install windows 7 back to the ssystem. When I insert Windows disc, the laptop do not boot from the Disc. I tried to disabling booting from hard disc and left only option to load from the optical drive, but the system still do not read the disc and gives me error: No OS found.

I am not sure how I can uninstall Ubuntu completely and install Windows 7 from the Disc. And I do not have a partion on HD from where I can run Windows 7. Linux is using the whole HD. Can someone please help?

[oz]

When I insert Windows disc, the laptop do not boot from the Disc. I tried to disabling booting from hard disc and left only option to load from the optical drive, but the system still do not read the disc and gives me error: No OS found.

I am not sure how I can uninstall Ubuntu completely and install Windows 7 from the Disc.

Hello and welcome!

Sometimes, having GRUB on the MBR can cause a Windows installation disk to not be detected properly. Clear your MBR and your Windows installation disk should work properly again if that disk is not corrupted in some way. There is no need to remove Ubuntu, but you can do that too, by simply deleting those partitions.

[cheema0003]

And how can I clear MBR ?
I am sorry I am very new to these things and probably the reason I messed it up.

[oz]

You can do it from a terminal in Ubuntu with the following command:

sudo dd if=/dev/zero of=/dev/sda bs=512 count=1

That's assuming sda is the device on which you are wanting to clear the MBR.

Edit: note that the above command will clear the MBR and partition table.

[linuxwin2]

You must install windows on first partition then install grub.