When you start up the minecraft Launcher, above 'Log In' is 'Settings'. In the Settings, select 'Force Update', then 'Done'. It will re-download the minecraft.jar, wiping any changes you have made to it.
/toggledownfall to stop or make rain in minecraft
One of the Minecraft files that are required to start it may be corrupted. Uninstall and reinstall Minecraft and see if that fixes it.
Fix your Java, for example if you have a 32bit pc, use 32java, if you have a 64bit pc, use java 64 bit, or clean out your cache and memory, minecraft needs to have good performace and good backup space (~1 GB)
Try running it as an administrator and make sure you have the latest minecraft launcher and the latest version of java.
Use the command:/toggledownfallOr just sleep in a bed
/toggledownfall to stop or make rain in minecraft
Try to reinstall Minecraft.
Minecraft uses a load of memory! (For me, it's 989 MB of RAM) You should probably close Minecraft if you're using Skype at the same time.
Make sure it has got new batteries. If it has, it may be broken.
One of the Minecraft files that are required to start it may be corrupted. Uninstall and reinstall Minecraft and see if that fixes it.
add more ram
Fix your Java, for example if you have a 32bit pc, use 32java, if you have a 64bit pc, use java 64 bit, or clean out your cache and memory, minecraft needs to have good performace and good backup space (~1 GB)
It shouldn't now the newest update should stop any crashing
Minecraft doesn't put viruses on laptops, make sure you're getting it from the legitimate source.
Try running it as an administrator and make sure you have the latest minecraft launcher and the latest version of java.
Use the command:/toggledownfallOr just sleep in a bed
by being more carefull