Java broke

I'm new to mc java I'm only playing demo because I want to make sure it works on my laptop I got too play a bit but then it said this"Filename on disk: javaw.exe
Path: C:/Users\irela\OneDrive\Documents\Curse\Minecraft\Install\runtime\jre-x64\1.8.0_51\bin\javaw.exe
Exists: true" I tried uninstall and re and nothing works I'm not gonna buy a game that doesn't work.