以前用winrar解压iso，然后运行wubi.exe。但是有如下的错误提示，不能安装。就想到了这个方法，简单也不用硬盘分区什么的，不想用直接卸载就可以。

用wubi安装的情况下ubuntu自动加载windows的分区，ntfs或者fat格式的都可以。

另外windows下用explore2fs加载文件就可以访问ubuntu的文件。

下面是一些ubuntu的配置文件

# menu.lst – See: grub(8), info grub, update-grub(8)
#            grub-install(8), grub-floppy(8),
#            grub-md5-crypt, /usr/share/doc/grub
#            and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify ‘saved’ instead of a number. In this case, the default entry
# is the entry saved with the command ‘savedefault’.
# WARNING: If you are using dmraid do not use ‘savedefault’ or your
# array will desync and will not let you boot your system.
default        0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout        10

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
#hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line)  and entries protected by the
# command ‘lock’
# e.g. password topsecret
#      password –md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title        Windows 95/98/NT/2000
# root        (hd0,0)
# makeactive
# chainloader    +1
#
# title        Linux
# root        (hd0,1)
# kernel    /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
##      kopt_2_6_8=root=/dev/hdc1 ro
##      kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=04B89C62B89C53D0 loop=/ubuntu/disks/root.disk ro

## Setup crashdump menu entries
## e.g. crashdump=1
# crashdump=0

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,6)/ubuntu/disks

## should update-grub create alternative automagic boot options
## e.g. alternative=true
##      alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
##      lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash

## should update-grub lock old automagic boot options
## e.g. lockold=false
##      lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
##      altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
##      howmany=7
# howmany=all

## should update-grub create memtest86 boot option
## e.g. memtest86=true
##      memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title        Ubuntu 8.04, kernel 2.6.24-16-generic
root        (hd0,6)/ubuntu/disks
kernel        /boot/vmlinuz-2.6.24-16-generic root=UUID=04B89C62B89C53D0 loop=/ubuntu/disks/root.disk ro quiet splash
initrd        /boot/initrd.img-2.6.24-16-generic

title        Ubuntu 8.04, kernel 2.6.24-16-generic (recovery mode)
root        (hd0,6)/ubuntu/disks
kernel        /boot/vmlinuz-2.6.24-16-generic root=UUID=04B89C62B89C53D0 loop=/ubuntu/disks/root.disk ro single
initrd        /boot/initrd.img-2.6.24-16-generic

title        Ubuntu 8.04, memtest86+
root        (hd0,6)/ubuntu/disks
kernel        /boot/memtest86+.bin

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title        Other operating systems:
root
boot/grub/menu.lst

# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title        Windows NT/2000/XP
root        (hd0,0)
savedefault
chainloader    +1

/proc/mtrr

reg00: base=0×00000000 (   0MB), size= 256MB: write-back, count=1
reg01: base=0×10000000 ( 256MB), size= 128MB: write-back, count=1
reg02: base=0xd0000000 (3328MB), size=  32MB: write-combining, count=1
reg05: base=0xe0000000 (3584MB), size=  64MB: write-combining, count=1