I am trying to install the standalone Force.com IDE app and I get the error "Invalidor corrupt jarfile force.com-ide-installer-win32.exe".  I have tried running it directly and downloading it to my laptop first and then running the install.  Both cases give me this error (just different file locations).

My laptop has Windows XP Professional Version 2002 SP 3 and JRE 1.6.0_31.  No other versions of JRE exist.

I have googled and searched through many other posts & forums and most cases were tied to the JRE installation (not existing or wrong version) which I have confirmed is not the reason for my issueu.

Does anyone know how to fix this?