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

Check Window > Preferences > Java > Installed JREs. Make sure there's something there; if there isn't, add one.

Did you recently update your JDK?