Problems in Upgrading 12.04 to 14.04 which is 64bit wubi application?

Solution 1:

what Jo-Erlend posted is not entirely true (at least not in my case), i just did the upgrade yesterday and when i typed the command:

sudo do-release-upgrade --check-dist-upgrade-only --devel-release

it gave me the option to upgrade to 14.04 lts (i was using 12.04 lts)

however, i did encounter mayor problems after the upgrade (missing files, could not log in, etc)

Thankfully i had a backup, so i opted for an bootable USB with 14.04 and it all went perfect, no more issues, but Jo-Erlend is right, Wubi is not supported anymore

My advice, if you want to upgrade, back up your info and install 14.04 via USB (it will give you the choice of replacing completely the previous Ubuntu 12.04 version)