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So I always installed optifine and had no problems with it.But it started happening a few days ago.So I go Create a new world it starts loading and when I spawn,Minecraft freezes and stops responding.Without OptiFine everything is normal,except I have low fps.Here is my log:
Client> [15:56:19] [Client thread/INFO]: Attempt 1...
Client> [15:56:22] [Server thread/INFO]: Starting integrated minecraft server version 1.7.2
Client> [15:56:22] [Server thread/INFO]: Generating keypair
Client> [15:56:23] [Server thread/INFO]: Converting map!
Client> [15:56:23] [Server thread/INFO]: Scanning folders...
Client> [15:56:23] [Server thread/INFO]: Total conversion count is 0
Client> [OptiFine] ViewRadius: 10, for: [email protected] (constructor)
Client> [OptiFine] ViewRadius: 10, for: [email protected] (constructor)
Client> [OptiFine] ViewRadius: 10, for: [email protected] (constructor)
Client> [15:56:24] [Server thread/INFO]: Preparing start region for level 0
Client> [15:56:25] [Server thread/INFO]: Preparing spawn area: 2%
Client> [15:56:26] [Server thread/INFO]: Preparing spawn area: 5%
Client> [15:56:27] [Server thread/INFO]: Preparing spawn area: 7%
Client> [15:56:28] [Server thread/INFO]: Preparing spawn area: 10%
Client> [15:56:29] [Server thread/INFO]: Preparing spawn area: 12%
Client> [15:56:30] [Server thread/INFO]: Preparing spawn area: 14%
Client> [15:56:31] [Server thread/INFO]: Preparing spawn area: 17%
Client> [15:56:32] [Server thread/INFO]: Preparing spawn area: 19%
Client> [15:56:33] [Server thread/INFO]: Preparing spawn area: 22%
Client> [15:56:34] [Server thread/INFO]: Preparing spawn area: 24%
Client> [15:56:35] [Server thread/INFO]: Preparing spawn area: 27%
Client> [15:56:36] [Server thread/INFO]: Preparing spawn area: 29%
Client> [15:56:37] [Server thread/INFO]: Preparing spawn area: 32%
Client> [15:56:38] [Server thread/INFO]: Preparing spawn area: 35%
Client> [15:56:39] [Server thread/INFO]: Preparing spawn area: 37%
Client> [15:56:40] [Server thread/INFO]: Preparing spawn area: 39%
Client> [15:56:41] [Server thread/INFO]: Preparing spawn area: 42%
Client> [15:56:42] [Server thread/INFO]: Preparing spawn area: 44%
Client> [15:56:44] [Server thread/INFO]: Preparing spawn area: 47%
Client> [15:56:45] [Server thread/INFO]: Preparing spawn area: 49%
Client> [15:56:46] [Server thread/INFO]: Preparing spawn area: 52%
Client> [15:56:47] [Server thread/INFO]: Preparing spawn area: 54%
Client> [15:56:48] [Server thread/INFO]: Preparing spawn area: 56%
Client> [15:56:49] [Server thread/INFO]: Preparing spawn area: 58%
Client> [15:56:50] [Server thread/INFO]: Preparing spawn area: 61%
Client> [15:56:51] [Server thread/INFO]: Preparing spawn area: 63%
Client> [15:56:52] [Server thread/INFO]: Preparing spawn area: 65%
Client> [15:56:53] [Server thread/INFO]: Preparing spawn area: 67%
Client> [15:56:54] [Server thread/INFO]: Preparing spawn area: 69%
Client> [15:56:55] [Server thread/INFO]: Preparing spawn area: 72%
Client> [15:56:56] [Server thread/INFO]: Preparing spawn area: 74%
Client> [15:56:57] [Server thread/INFO]: Preparing spawn area: 76%
Client> [15:56:58] [Server thread/INFO]: Preparing spawn area: 78%
Client> [15:56:59] [Server thread/INFO]: Preparing spawn area: 80%
Client> [15:57:00] [Server thread/INFO]: Preparing spawn area: 83%
Client> [15:57:01] [Server thread/INFO]: Preparing spawn area: 85%
Client> [15:57:02] [Server thread/INFO]: Preparing spawn area: 87%
Client> [15:57:03] [Server thread/INFO]: Preparing spawn area: 89%
Client> [15:57:04] [Server thread/INFO]: Preparing spawn area: 91%
Client> [15:57:06] [Server thread/INFO]: Preparing spawn area: 94%
Client> [15:57:07] [Server thread/INFO]: Preparing spawn area: 97%
Client> [15:57:08] [Server thread/INFO]: xFrozeNNNx[local:E:4b6232f6] logged in with entity id 268 at (-251.5, 40.0, 168.5)
Client> [15:57:08] [Server thread/INFO]: xFrozeNNNx joined the game
Client> [15:57:13] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 4655ms behind, skipping 93 tick(s)
Game ended with bad state (exit code -805306369)

No,it's singleplayer.

No,I'm using 1.7.2 and OptiFine 1.7.2.It's the same with 1.6.4.

Instructions http://optifine.net/downloads.php 1.7.2 Ultra download ---> http://files.minecraftforge.net/ 1.7.2 Installer ---> Direct here ---> Open it up ---> Client. Then go to the start button ----> search -----> %appdata% ----> .minecraft ----> Mods -----> Put the optifine jar in the mods ----> Minecraft launcher ----> edit profile ----> Use version ----> release 1.7.2-Forge10.12.0.985 If I helped please click the green button and feel free to ask any questions :)^^^^ I suggest reinstalling

Thanks.Will try that.