Unable to locate the Java runtime.

My minecraft when i start it (LabyMod 1.8.8 Modified) it just says Unable to locate the Java runtime. It happens with all minecraft versions too.
Error details: Feil funksjon
Filename on disk: javaw.exe
Path: C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25\bin\javaw.exe
Exists: false

Can you guys help me?
I want to play minecraft again