I do not see a 64 bit install option. My machine has 2444 GB of free disk space and 4 GB of RAM.
The error I get is "The wizard was interrupted before Solid Edge ST6 could be completely installed." The message appears immediately after pressing the Install > button at the bottom of the setup page. I am running the installation file as administrator and also tried running in legacy compatibility modes. The same error appears regardless. I also followed the microsoft instructions to add full DCOM permissions to my user as suggested by Microsoft support on this issue. No difference is observed.