don't disable firewall - open ports UDP 1870 and TCP 1871 in your firewall...also do at Routers firewall (if any)
you might also make an exeption in AV program for java.exe and javaw.exe
Your Notebook is very special!
with a personality of its own
but great you found a workaround!
I can't recommend to use older versions of Java 6 or 7 for everyone as there are exploits that have been fixed in actual updates!
And i don't think that having the Java updated version installed is the reason for HnH not running - mostly it's some programs or settings...