I have tried the compatibility mode and the clean boot, still crashes in the fights mentioned above. What I did when I reinstalled was I backed up those files and removed them from the my documents folder, and then after reinstalling, I only copy and pasted the FFXIV_CHRXXXX file back into the newly created FINAL FANTASY XIV - A Realm Reborn file in Documents/My Games. Unfortunately, did not help. I am tempted to do a complete factory reset on my computer but I would really appreciate if I can avoid that. As it is, I am barred from doing certain fights like the new suzaku fight and the Tsukuyomi ex fight.