No.
Nothing will happen if you keep installing and uninstalling Minecraft. Minecraft does not track how many times you have installed it nor does track how many computers you have it installed on. The only drawback is if you uninstall Minecraft by deleting the .minecraft folder you will lose all of your saved worlds on that computer.
It probably won't work and you'd have to get rid of the mod and try and find a more updated one. It probably will work though.
Yes, you can play Minecraft without the internet. However, you must first have had Minecraft installed at one point (which happens when you log in with the internet just once). After this, when you log in you can select the option to "Play Offline," however you cannot play on servers unless they're cracked, or their online-mode is set to false. You can check on this by contacting the server owner, or try it yourself.
You will die after a while.
The creeper drops a music disc.
it crashes, memory overload
Nothing will happen if you keep installing and uninstalling Minecraft. Minecraft does not track how many times you have installed it nor does track how many computers you have it installed on. The only drawback is if you uninstall Minecraft by deleting the .minecraft folder you will lose all of your saved worlds on that computer.
It probably won't work and you'd have to get rid of the mod and try and find a more updated one. It probably will work though.
Nothing happens.
(this is not an answer i am just adding to detail) I am trying to install the x-ray mod which says it does not need modloader or anything else like that. so i do everything it says in the tutorial (open minecraft.jar, delete meta-inf, drag in the files) but when i start up minecraft nothing happens, it plays minecraft as if i had not installed the mod in the first place. Am i doing somthing wrong?
Yes, you can play Minecraft without the internet. However, you must first have had Minecraft installed at one point (which happens when you log in with the internet just once). After this, when you log in you can select the option to "Play Offline," however you cannot play on servers unless they're cracked, or their online-mode is set to false. You can check on this by contacting the server owner, or try it yourself.
Depending on what you mean by "lose" your world it could be corrupted or not installed properly and you might have just acedently deleted it but if you did any of those thing I am sorry to tell you but think you will not be able to get it back.
This usually happens if you are using the cracked version of Minecraft
You obtain another natural number that is ten times as great as the original one.
Cows fall from minecraft!
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It's illegal to download Minecraft for free. WikiAnswers will not provide guidance for illegal actions.