The "Release Date Check Failed" error is a wall, but behind that wall is the best sound design in FPS history (the doppler effect of a tank shell whizzing past your head), the best map design (Seine Crossing, Damavand Peak's base jump), and a progression system that respected your time.
Do not uninstall the game yet. Do not reinstall Windows. Follow these fixes in order. Solution #1 works for 80% of users. battlefield 3 release date check failed