I remember that when I "end task "the NF and Chrome and re-opened NF again the Gameguard required me to restart my computer due to conflict with NF had running. I restarted my computer and I noticed while it was restarting, it took some time for my lappy to restart. After rebooting, windows started to update something and the problem occured.
it took me some redownloading, uninstall, reinstall, deleting NF related folders and registries one by one, disabling anti virus, etc. And this update screwed me out. I just deleted the update and get the game working again.