First Uninstall any versions of java already installed and clear out all files inside the minecraft appdata folder EXCEPT "saves"
(C:\Users\*username*\appdata\.minecraft\)
Install Java:
#1 Go to this website:
http://www.oracle.com/technetwork/ja...ads/index.html
#2 Underneath the big buttons is "Java Platform, Standard Edition" - click "Download JDK" just under that on the right hand side.
#3 Make sure you select the right java for your system from the drop down box (64bit/32bit etc), tick "I agree" and press continue.
#4 If the download doesn't start automatically after that, go down to the available files and click the .exe there to start it.
#5 When the download finishes, run the installation with the standard settings and wait for it to finish.
Download Minecraft.jar:
#1 Go to minecraft.net and log in.
#2 Go to the download page and download the minecraft.jar in the "linux/other" section
#3 Open windows explorer and navigate to C:\
#4 if you see a "program files" folder and a "program files (x86)" folder then you are running 64 bit windows
#5 (64 bit users) open "program files (x86)" and create a new folder in there called "Minecraft" and copy the minecraft.jar you downloaded into that folder.
#6 (32 bit users) open "program files" and create a new folder in there called "Minecraft" and copy the minecraft.jar you downloaded into that folder.
Create Shortcut to run it from:
Right click on the desktop and create a new shortcut with the following target (copy between the lines):
(64bit users)
Target:
----------
"C:\Program Files\Java\jre6\bin\java.exe" -Xmx512M -Xms512M -cp "C:\Program Files (x86)\Minecraft\Minecraft.jar" net.minecraft.LauncherFrame
----------
(32bit users)
Target:
----------
"C:\Program Files (x86)\Java\jre6\bin\java.exe" -Xmx512M -Xms512M -cp "C:\Program Files (x86)\Minecraft\Minecraft.jar" net.minecraft.LauncherFrame