Because Ubuntu 8.04 is long past its end-of-life (EOL), official mirrors no longer host the installer on their primary pages. To find the "wubi.exe" file specifically for the 8.04 release, you must look to community archives: Ubuntu 8.04.4 LTS (Hardy Heron)
Searching for a takes you back to a pivotal moment in Linux history. Released alongside Ubuntu 8.04 LTS (Hardy Heron) in 2008, Wubi—the Windows-based Ubuntu Installer —revolutionized how beginners experienced Linux by allowing it to be installed just like any other Windows application. wubi 8.04 download
Wubi 8.04 was the first version of the installer to be officially integrated into the Ubuntu release cycle. Its primary goal was to lower the barrier for Windows users to try Linux without the "scary" steps of manual disk partitioning. Because Ubuntu 8
The desktop CD allows you to try Ubuntu without changing your computer at all, and at your option to install it permanently later. Wubi 8
: Upon restarting, users were presented with a boot menu to choose between Windows and Ubuntu.