Eclipse - no Java (JRE) / (JDK) … no virtual machine

Question

I am trying to get Eclipse v3.5 (Galileo) to re-run on my computer - I have run it before with no problems, but now I keep getting this error:

Answer 1

I had a co-worker with this exact problem last week. He fixed it by installing the x64 version of Eclipse and the x64 JDK.

Edit: he reused his old workspace after installing the necessary plugins, so that should not be much of an issue