**NOTE** Be sure you are running 64bit version of Java if you have a 64 bit OS.
- Open your CONTROL PANEL.
- Type 'Java' inside the 'Search Control Panel' box.
- Click the Java icon that pops up.
- Click the Java tab.
- Click View...
- Make sure there is only ONE line in here; any more lines could cause issues.
If you have multiple lines uninstall all versions of Java from your system and download Java JDK 7 from the following link.
Make sure to get the x64 version if you have a 64-bit OS.
- Change the memory runtime parameter ("-Xmx").
For instance, you may need to set it to:
Change the value between "-Xmx" and "M" depending on how much RAM you have.
For 32-bit Operating Systems, 768M may work well. If you have 64-bit, or that doesn't work, try other values, such as:
The best value for you varies depending on how much System RAM you have. Be careful not to give it more than 500 MB or so from your physical amount!
- Click OK.
- Run Minecraft