The 64-bit versions of Windows are a bit weird. The "Program Files (x86)" directory name causes problems in a command shell. Try this:
1) Open a command prompt
2) Run the command
and see what you get.
If it bombs out in some way, such as something being "unexpected at this time" then that's probably it. The parentheses in the path name don't work in their own command shell. How Microsoft let that by I don't know. It's pretty braindead. If this is the problem, you'll need to edit the Path environment variable to replace all instances of "Program Files (x86)" to "progra~2".
You'll want to verify that this is the correct value first, by running the following at that command prompt:
dir /x c:\
and find the right value for that directory.
If instead, you get
'java' is not recognized as an internal or external command, operable program or batch file.
then you need to add the bin directory of your JRE to the path.
If you still can't get it to work, I'll try it on one of the test machines at work and see what I can work out.