Minecraft – Cannot run Minecraft on Windows 7

Try the game, on new install, WITHOUT ANY MODS installed. Not just activated, but installed also

Steps:

• Uninstall (Not Delete) New Vegas. Do this true Steam, or through your uninstaller manager
• Remove all mods that you own. This should be in the default directory in which FOMM installs the mods
• Redownload New Vegas via steam (no mods)
• Verify Game Cache, see if it brings up errors. If so, let it run and redo this step when done. If not, proceed
• Try the game, on your main laptop (no secondary display). Set resolution out of game to native resolution
• See if the game works. If it does, then close the game, plug into second display
• Set second display to native resolution
• Play game on second display, see if that works

If it does, then TADA. If not, just comment. Remember, don't install any mods until you can do the steps above.

This Reddit post states that Forge ModLoader is incompatible with Java 8 Update 20 and later. It has been fixed for recent Minecraft 1.7.10 builds, however, there is currently no fix for 1.7.2 and 1.6.4. In the meantime, try rolling back to an earlier version of Java (version 7, or a Java 8 build prior to Update 20).