Install ubuntu14.04 under Windows with Wubi

The first step, download the partition assistant, to separate a blank area (note: Wubi this way to install Ubuntu maximum 30G, so the partition between 10-30g can be)

The second step is to download the ubuntu14.04-desktop version of ISO from the Ubuntu official website.

The third step, using the decompression tool to open the ISO file, note that you do not need to extract all, just the root directory of Wubi.exe extracted out can be. Put Ubuntu14.04-desktop.iso and Wubi.exe into the new area of the first step.

Fourth step, start the installation, note the installation to disconnect the network, because in the networked state of installation, will re-download Ubuntu14.04-desktop.iso, wasting time. Disconnect the network, double-click Wubi.exe, Pop-up window select the installed drive letter, username and password, click Confirm. System restarts automatically, waiting for installation to complete

The fifth step, after restarting, 14.04 will appear the problem of system mount, can not enter the GUI system. We need to boot up and go into the purple selection of Ubuntu launcher screen. Press Keyboard E to enter the editor. Find "Ro rootflags=sync" and change to "RW Rootflags=sync". Then press F10 to start. Yes, with a single letter, the system can be started in Wubi.

Sixth step, yes. Just like you think, this is only one effective way. Manual changes are needed for each boot. But we can make it permanent by modifying the way the configuration file works.
(a) After entering the system, open the terminal and perform
$sudo Gedit/etc/grub.d/10_lupin
Change the 150th line of the file, change the RO to RW, save.
Linux ${rel_dirname}/${basename} root=${linux_host_device} loop=${loop_file_relative} ro ${args}//Before modification
Linux ${rel_dirname}/${basename} Root=${linux_host_device} loop=${loop_file_relative} RW ${args}//Modified
(b) Then update the initiator configuration file
$sudo Update-grub

Finally, the installation ends

Install ubuntu14.04 under Windows with Wubi