I have had the last Ubuntu distro (10.something) installed for a year and love it.
But I have run in to an issue when I tried to upgrade it to the latest one it did not work and there has come some serious issues now with almost everything and I want to remove Ubuntu completely and install the new one.
How can I remove the operating system (I don’t mind formatting the whole thing if that’s what’s needed).
The graphical installer will ask you what to do. Among those options is to replace your existing Ubuntu installation. I think it'll even keep your files. As always, though, it is a good idea to have backups when you're doing things like that. But I think you should figure it out if you just boot 11.10 graphical installer.
If you intend to wipe the operating system and all data on the harddrive, then you should try Dban (Darik's Boot and Nuke).
Go to http://www.dban.org/download to download a bootable ISO image, burn it to a CD-R or DVD-R media, and boot from it. Follow the on-screen instructions.
Beware that this will remove all data on the harddrive!
Dban is a tool commonly used to securely erase data when decommissioning a system.
