When I try to download Ubuntu 12.04 using the Windows installer (Wubi) through a proxy server which requires proxy authentication, after I choose the Ubuntu installation size, username and password, when I click the Install button, I get this error:
An error occurred: Could not retrieve the required disk image files For more information, please see the log file: c:\users\(myusername)\appdata\local\temp\wubi-12.04-rev266.log
The log file says:
proxy authentication error
How can I solve this problem?