Add C:\Program Files\Java\jre1.6.0\bin\javaws.exe to trusted application in commodo firewall
If you are using 64 bit vista then the path is
C:\Program Files (x86)\Java\jre1.6.0\bin\javaws.exe
In all the forums i found out this problem to be specific to systems running on Windows Vista and having comodo Firewall. I am not sure whether this happens to systems with firewall from a different vendor.
“I fixed this but updating the registry settings on my Windoze 7 x64 machine:
(Default) => “C:\Program Files (x86)\Java\jre1.6.0_16\bin\javaws.exe” -Xnosplash “%1″
No matter the location of the javaws.exe file is located, just add the -Xnosplash after it and you should be good to go!”