I recently downloaded WinRAR and tried to download two mods to speed up my game, Optifine and mcregion. I was unable to even play the game after the download of both of them into my bin folder, so I deleted my .minecraft folder to clear my game. I also attempted to uninstall WinRAR and my computer immediately crashed. After my computer started up again, I opened minecraft and started a brand new world in singleplayer, and after pressing F3 to check my FPS and chunk updates, I noticed that they were both in sync. They both stay between 0 and 15 and I have no idea what brought this on. I looked on google, but I haven't been able to find any solutions other than people saying that they have this problem after 1.8. If anyone can help, I'd really appreciate it. I'm probably going to restart my computer and see if that makes a difference, and if it does, I'll update this.