I am running Ubuntu 11.10 on an Acer Aspire One D255 netbook dual-booted with Windows 7 Starter using Wubi.
Up until now, everything has worked perfectly. When I started Ubuntu up today, instead of showing the purple loading screen, it showed me a terminal that was printing what appeared to be startup logs. No error showed, and eventually I was presented with a root prompt: "root@ubuntu:~#".
I used the prompt to back up my important files to an external hard drive, but I would prefer not to have to reinstall it.
Does anyone have any ideas why it would do something like this?