Launcher wont work

I tried to play Minecraft but this error came up:

Unable to locate the Java runtime.
Error details: The system cannot find the path specified
Filename on disk: javaw.exe
Path: C:/Program Files\Minecraft\runtime\jre-x32\1.8.0_25\bin\javaw.exe
Exists: false

It doesn't work in advanced or launching through the settings. This hasn't happened before so I'm not sure what to do.