DeimosGER

I need Help. I have installed the newest version of Java and Forge, yet the runner wont open. When i run it with Java, it displays an Error message: Java cannot be installed In the following switches are Errors: "C/Users/Deimos/DOwnloads/Forge-1.12.2-14.23.5.2789-installer.jar" Make sure that all Commands are valid and try again. Can anyone Help me? (i have roughly translated it from german, please excuse any errors)