Ubuntu not showing up on boot menu after Wubi installation

I have installed Ubuntu to my hard drive using Wubi. The installation seemed to be successful; however, after rebooting my PC I am not brought to a boot menu, and Windows just starts normally. When I manually force my computer to a boot menu, Ubuntu is not listed.

Solution 1:

For XP, right click My Computer, click on Properties, click the Advanced tab, Startup & Recovery settings.

Make sure that the Time to display operating systems is 10.

If the timeout is not zero, then in rare cases there is a line missing from the end of the C:\boot.ini required to boot Ubuntu: C:\wubildr.mbr = "Ubuntu"

If you decide to edit the boot.ini, make sure you back it up, and edit it from the same place.

It should look something like this:

[boot loader] 
timeout=10 
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS 
[operating systems] 
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect 
C:\wubildr.mbr = "Ubuntu" 

For Windows 7, right click on Computer, Properties, Advanced system settings (on the left):

Then click on Startup & Recovery settings:

Make sure the Time to display list of operations systems is set to 10 or above. If that's not the problem, run CMD.EXE selecting to Run as an administrator, then enter bcdedit to make sure there is an entry for Ubuntu.