Make sure it's installing in the right place, and the files are all completed. Make sure Directx is installed, and the log-in page is open when you open FH. You also may want to try switching from Open LG to the other. c:
That's the most I can offer, other than your computer might just hate FH rn. ;;
Good luck and I hope it works at some point.<3
Did you download any maps, items, mods, or markings before opening FH for the first time?