Launcher won't open after uninstalling and re-installing Java

I had installed an unsupported version of Java on my PC about a month ago so I uninstalled it. Today I finally managed to install Java 7 properly, but the launcher says I need a JRE 1.6.0 or 1.5.0

What I expected to happen was...:
Launcher would opened

What actually happened was...:
It gave me that message that I need JRE 1.5/6.0