Hello Friend to the same as you, I also own a 64-bit computer and w7 and I worked too well the version 12, I advice you to use a virtual machine like virtual box, I have the TIA PORTAL V11 and I have to work on windows xp, and I have not had any problems in communication and configuration of the equipment I have a trial version of the V12, and then it went well, if you want more information go to this page siemens: https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo〈=es&objID=29156492&subtype=133100 https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo〈=es&objID=29156492&subtype=133200 I hope you have luck in solving your problem http://automatizacioneindustria.blogspot.com/
