I'm a newbie, so if I'm missing something incredibly obvious I'm sorry.
I'm currently using the newest code::blocks, 12.11 and I've tried 10.05 with Windows 7,
but I think this information is useless since code:blocks used to work on this computor.
I was following a tutorial on how to install a library and I managed to break something major,
and now I can't run a simple "Hello World" program.
The tutorial told me to install code::blocks and the Migwii compiler separately(which I did).
So, I uninstalled code::blocks from my control panel and upgraded
to the newest version... But somehow I've broken everything.
I can no longer run any programs, even the default "Hello World" program. Everytime I try to run programs,
it insists that the project hasn't been build, even though it obviously has been:

When I click yes, it still insists it hasn't been built and just reopens the window.
Since then I've uninstalled and reinstalled an older version (10.05) to see if anything has changed, but nothing has.
(Then I switched back to the 12.11)
I really have no clue what's going on, so yeah.