Minecraft 1.7+ randomly closing?

I seem to have a strange and quite annoying issue with these versions of Minecraft. Anyone know what the problem is, or if there's a way to fix it?

When I join a server/Singplayer world, soon after joining it often just randomly closes. No error screen or anything - It just closes Minecraft.

Also often in multiplayer I randomly lose connection more often than not… Is my computer just not able to properly run this version, or what?

This happens with both 1.7.2 and 1.7.4, I only use optifine. I haven't used the 1.8 snapshots much, but in the times I have used them, I never experienced this problem. Just with 1.7.

Any help would be greatly appreciated!

Is there a good hack client for minecraft 1.7.2-1.7.4?

So i've already try'd Nodus and Huzini but none of them have a lot of options to choose from and when i go on a multiplayer server it won't let me use fly/flight which bothers me a bit because its one of the main reasons i installed it. Is there any hack client out there for 1.7.2-.1.7.4 that will let you fly in a multiplayer server no matter what? And is there a hack client that lets you spawn things like animals and mobs?

I keep lagging out of minecraft servers?

I have a razer blade, its quad core, and on most servers i average a ping of about 50, and an fps of anywhere from 160 to 420. How come I keep lagging out of servers, its not just one, its on every server i play, it will be fine for a few mins, then it will lag and only i will disconnect. The messages usually say one of two messages: something about "disconnected by a remote host" or "server connection time error" neither of these are exact, especially the second one but they are what i remember. Please help

Added (1). i just got it again, the second message it shows is usually "internal exception: io.netty.handler.timeout.readtimeoutexce…

Why won't my mincraft server work?

I have my ports forwarded and it has worked a bunch of times i had it up not even a week ago i can get on it but for some reason my friends can't i gave them the right ip and they have played before like a said not even a week ago we were all on it i can't seem to see why it won't work i have excellent internet and everything is setup correctly and has worked fine many times please help me.

I'm having minecraft problems?

So like, I'm trying to join my friends server (On the computer), and it keeps saying "Login failed" or Error: Failed to connect to server. I've tried restarting minecraft, but it's weird because the server works for everyone else, and it worked fine for me yesterday. If you can, just maybe tell me what I should do to fix it so it works again. Thanks!

Added (1). I tried resetting the router, and it still doesn't work.

How to portforward a Minecraft Server without a router username/password?

I have spent a lot of time on my server. When I try to port forward it, I can't get the username/password right. I have reset my router to factory settings and entered the default username/password and it still doesn't work. I have an axesstel MV440 router. Is there a program or something that can port forward the server without the password? If there isn't a program, how do I get my username/password?

Why can't I connect to minecraft server?

My fiance has had a minecraft server for several weeks now and I have always connected to it without any issue. Today, I went to access it and it tells me "can't connect to server". I have tried to access it from a different computer, uninstalling and reinstalling the minecraft.exe, and tried re-adding the server. Nothing has worked. If you log onto the computer that the server is on, you can access it. You just can't from any other computer. Any Ideas?

Added (1). Nope, the Ip is still the same. We even dropped the firewall and that didn't help.

How to make a command block take away certain items in your inventory in minecraft?

I'm making a server, i need to be able to make it so in some minigames(like hungergames), it clears all of the items you got in hunger games from your inventory. OR If its more specific like i'm giving someone a bow and some arrows for a game and i need to be able to take them back after, what is the command block command for this? If there isn't one is there a mod?

How to make a good minecraft server?

I want a Minecraft Server that has at least 50 player slots, easy to make, free, and no servays. Is it possible to do this without having a website host it for you? Either leave a link or tell me instructions please.

Why is my internet slow all of a sudden?

I was away from home for 8 days and when i came back on this laptop only its like my internet turned very bad. After every youtube video i watch i have to disconnect and reconnect to the internet to browse for more, it takes me like 2 minutes just to go to a website and i can't stay on a minecraft server for more than a minute, some i can't even connect to. I obviously haven't downloaded or even turned on my laptop since i came back and i did an avg full system scan and had no threats. Any ideas?