Ok, added nasm to my environment variables. Made a little mistake there. Typing "nasm" into cmd now outputs: nasm:fatal: no input file specified type `nasm -h' for help However, the error in Qt Creator remains the same EDIT: It works now! Just had to restart Qt :) Thank you guys, you are awesome :) [image: d926805a-06a2-4a71-b54d-e33ab93a3c1e.png]