this solution can help you if you run install.cmd and see errors like "system error 2 : specified file not found" in console and wipfw doesn't work
all you need is to edit the 3rd line of install.cmd file from the wipfw-0.2.8_x64.zip :
set d=%systemroot%\system32
must be changed to
set d=%systemroot%\sysnative
save this change and restart install.cmd
now it installs your...
2009-05-17 02:05:31 UTC in wipfw