Launcher can't locate a file

As soon as I try to launch minecraft thrue the launcher I get this error message:

Unable to locate the Java runtime.
Error details: The operation completed successfully.

Filename on disk: javaw.exe
Path: D:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25\bin\javaw.exe
Exists: javaw.exe

 

I tried reinstalling and the "runtime" folder just disapeared, since then it says that the folderis not existant. I tried fixing it but it won't work. Please helpme with this, I can't find a solution to this anywhere.

Thank you and goodbye.