Keyboard shortcuts

Accidentally I pressed Alt+O on my keyboard. I tried to make polish, closed u, something like "o" with period above it, and i activated it - an automatic Autosave function. How do I suppose to deativate all unnecesarry shortcuts or select to other all by myself? I don't know, you neither or maybe some update ... All weenies out there. Be free to use this topic as a search for keyboard shortcut's if necessary.