I am using an Acer Aspire One netbook with no CD-disk drive, and would like to uninstall Ubuntu 12.04 LTS and install Windows XP in its place. The problem here is that I can't seem to find a program that can put the windows boot files on a USB drive from an ISO file. I have Ubuntu fully installed and have tried using unetbootin. When I tried booting from unetbootin I got a screen with a blue box that had the word "default" in it highlighted. underneath the box there was a countdown that said "will boot from default in 10" after the countdown finished the number would revert to ten and nothing would happen. Can someone tell me another program that would be useful for this please?
4 Answers
Create a bootable Windows XP USB drive:
Download "ms-sys"
Install it.
Partition your USB drive to NTFS.
Now copy the files from your Windows XP ISO to the USB drive
Copy the Windows XP mbr to the USB drive
ms-sys -m /dev/sdX
Replace sdX with the number of your usb hard drive (for example: sda5).
After that, backup your data, then format your drive to NTFS from your Live USB.
You can now install Windows XP through the USB.
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Creating a bootable USB installer for Windows on Ubuntu
Edit: Windows XP doesn't seem to be supported by WinUSB. This method works fine for Windows Vista and up. See here for a different method that works with Windows XP.
WinUSB automates the process of creating a bootable USB stick from a Windows installation disk or .iso file. You can install it either from the .deb package provided on the homepage or through a PPA:
sudo add-apt-repository ppa:colingille/freshlight
sudo apt-get update
sudo apt-get install winusb
The GUI should be straightforward and easy to use:

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If you're trying to install Windows XP, you shouldn't need to "uninstall" Ubuntu. You can just install Windows XP. (You'll lose all your Ubuntu files, but I'm sure you know that.)
Installing Windows XP is another matter, and doesn't belong in askubuntu.com.
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Unless you have a modified SETUPLDR.BIN, it won't work from USB.
Needed:
Modified SETUPLDR.BIN
special stuff in the bootsector of the partition (use ms-sys).
Modified copy of txtsetup.sif copied to the root level
NTDETECT.COM copied to root level
WinUSB does not do this, UNetBootin does not do this, the diskpart tutorial does not do this, WinToFlash does not do this, and bit-banging the iso onto the device with dd does not do this.
Rufus does this. However, it is a Windows-only utility (that is unsupported by Wine), so follow the tutorial here (the big post):
https://superuser.com/questions/99478/make-a-bootable-usb-to-install-windows-xp-from-linux
Though I suppose you could share your target drive to VirtualBox, go through the first part of the installer, and then, instead of rebooting, shutdown the VM. Then turn the computer off and actually boot into the hard drive.
I think that would work because Windows does not become specific to a given hardware configuration until the second phase, I believe.
You see, if you did the whole installation from VirtualBox, Windows would be configured for VirtualBox's emulated hardware platform, not your real hardware.
The method of loading the whole iso into memory and booting it usually results in a blue screen at some point. If you really want to do that method, see this: http://diddy.boot-land.net/firadisk/files/win_iso_install.htm
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