This repair procedure works only for Windows Vista/W2008/W7-32/W7-64/W832/W864
1.Click Start.
2.Click Control Panel.
3.Click Programs
4.Click Default Programs.
5.Click Associate a file type or protocol with a program.
6.Click extension jnlp.
7.Click change Program.
8.Select javaws or navigate to C:\Program Files\java\jre8\bin\javaws.exe
Example of the error:
