Some update...
I was decided to replace the card with my 6205 that I was using on the other laptop. So I opened my brand new HP for the first time and just found out that the problem is not Intel... It's HP that simply have no quality control on their production. TThe aux1 cable was not connected correctly on the card!
Anyway so I just connected it and now I can see my 2.4GHz access point correctly. I guess it was touching the connector from time to time explaining why I sometime have connection! It looks like it was touching the aux connector but it was not securely connected...
I have now the latest drivers and it works... I'll send update if it stops later ;-) I did not expect electrical problem as I was able to see form time to time the 2.4.... but I was wrong ;-) anyway glad it works!